Intercept and Slope Function

B

bancanus

New Member
Joined
Apr 26, 2018
Messages
2
The output of Intercept and Slope function is not what I expected.

[TABLE="width: 311"]
<colgroup><col><col></colgroup><tbody>[TR]
[TD]=INTERCEPT(A2:A113,B2:B113)[/TD]
[TD="align: right"]497.167[/TD]
[/TR]
[TR]
[TD]=SLOPE(A2:A113,B2:B113)[/TD]
[TD="align: right"]-0.01124[/TD]
[/TR]
</tbody>[/TABLE]

I expect to see Intercept around 12.558, slope around -0.0102

Am I missing something?


[TABLE="width: 160"]
<colgroup><col><col></colgroup><tbody>[TR]
[TD]X[/TD]
[TD]Y[/TD]
[/TR]
[TR]
[TD="align: right"]16-Jan-2018[/TD]
[TD="align: right"]13.705[/TD]
[/TR]
[TR]
[TD="align: right"]17-Jan-2018[/TD]
[TD="align: right"]12.929[/TD]
[/TR]
[TR]
[TD="align: right"]18-Jan-2018[/TD]
[TD="align: right"]12.281[/TD]
[/TR]
[TR]
[TD="align: right"]19-Jan-2018[/TD]
[TD="align: right"]13.058[/TD]
[/TR]
[TR]
[TD="align: right"]20-Jan-2018[/TD]
[TD="align: right"]12.152[/TD]
[/TR]
[TR]
[TD="align: right"]21-Jan-2018[/TD]
[TD="align: right"]12.152[/TD]
[/TR]
[TR]
[TD="align: right"]22-Jan-2018[/TD]
[TD="align: right"]13.446[/TD]
[/TR]
[TR]
[TD="align: right"]23-Jan-2018[/TD]
[TD="align: right"]13.446[/TD]
[/TR]
[TR]
[TD="align: right"]24-Jan-2018[/TD]
[TD="align: right"]12.087[/TD]
[/TR]
[TR]
[TD="align: right"]25-Jan-2018[/TD]
[TD="align: right"]12.022[/TD]
[/TR]
[TR]
[TD="align: right"]26-Jan-2018[/TD]
[TD="align: right"]12.815[/TD]
[/TR]
[TR]
[TD="align: right"]27-Jan-2018[/TD]
[TD="align: right"]13.317[/TD]
[/TR]
[TR]
[TD="align: right"]28-Jan-2018[/TD]
[TD="align: right"]13.187[/TD]
[/TR]
[TR]
[TD="align: right"]29-Jan-2018[/TD]
[TD="align: right"]12.022[/TD]
[/TR]
[TR]
[TD="align: right"]30-Jan-2018[/TD]
[TD="align: right"]12.411[/TD]
[/TR]
[TR]
[TD="align: right"]31-Jan-2018[/TD]
[TD="align: right"]11.893[/TD]
[/TR]
[TR]
[TD="align: right"]1-Feb-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]2-Feb-2018[/TD]
[TD="align: right"]11.893[/TD]
[/TR]
[TR]
[TD="align: right"]2-Feb-2018[/TD]
[TD="align: right"]11.893[/TD]
[/TR]
[TR]
[TD="align: right"]2-Feb-2018[/TD]
[TD="align: right"]13.446[/TD]
[/TR]
[TR]
[TD="align: right"]2-Feb-2018[/TD]
[TD="align: right"]13.187[/TD]
[/TR]
[TR]
[TD="align: right"]2-Feb-2018[/TD]
[TD="align: right"]11.893[/TD]
[/TR]
[TR]
[TD="align: right"]2-Feb-2018[/TD]
[TD="align: right"]11.893[/TD]
[/TR]
[TR]
[TD="align: right"]2-Feb-2018[/TD]
[TD="align: right"]11.763[/TD]
[/TR]
[TR]
[TD="align: right"]3-Feb-2018[/TD]
[TD="align: right"]13.187[/TD]
[/TR]
[TR]
[TD="align: right"]4-Feb-2018[/TD]
[TD="align: right"]12.411[/TD]
[/TR]
[TR]
[TD="align: right"]5-Feb-2018[/TD]
[TD="align: right"]12.281[/TD]
[/TR]
[TR]
[TD="align: right"]6-Feb-2018[/TD]
[TD="align: right"]12.67[/TD]
[/TR]
[TR]
[TD="align: right"]7-Feb-2018[/TD]
[TD="align: right"]11.893[/TD]
[/TR]
[TR]
[TD="align: right"]8-Feb-2018[/TD]
[TD="align: right"]13.187[/TD]
[/TR]
[TR]
[TD="align: right"]9-Feb-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]10-Feb-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]11-Feb-2018[/TD]
[TD="align: right"]13.317[/TD]
[/TR]
[TR]
[TD="align: right"]12-Feb-2018[/TD]
[TD="align: right"]12.929[/TD]
[/TR]
[TR]
[TD="align: right"]13-Feb-2018[/TD]
[TD="align: right"]12.67[/TD]
[/TR]
[TR]
[TD="align: right"]14-Feb-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]15-Feb-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]16-Feb-2018[/TD]
[TD="align: right"]12.411[/TD]
[/TR]
[TR]
[TD="align: right"]17-Feb-2018[/TD]
[TD="align: right"]12.022[/TD]
[/TR]
[TR]
[TD="align: right"]18-Feb-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]19-Feb-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]20-Feb-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]21-Feb-2018[/TD]
[TD="align: right"]12.152[/TD]
[/TR]
[TR]
[TD="align: right"]22-Feb-2018[/TD]
[TD="align: right"]11.569[/TD]
[/TR]
[TR]
[TD="align: right"]23-Feb-2018[/TD]
[TD="align: right"]11.375[/TD]
[/TR]
[TR]
[TD="align: right"]24-Feb-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]24-Feb-2018[/TD]
[TD="align: right"]11.893[/TD]
[/TR]
[TR]
[TD="align: right"]25-Feb-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]25-Feb-2018[/TD]
[TD="align: right"]11.893[/TD]
[/TR]
[TR]
[TD="align: right"]26-Feb-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]27-Feb-2018[/TD]
[TD="align: right"]11.44[/TD]
[/TR]
[TR]
[TD="align: right"]28-Feb-2018[/TD]
[TD="align: right"]11.893[/TD]
[/TR]
[TR]
[TD="align: right"]1-Mar-2018[/TD]
[TD="align: right"]11.505[/TD]
[/TR]
[TR]
[TD="align: right"]2-Mar-2018[/TD]
[TD="align: right"]12.022[/TD]
[/TR]
[TR]
[TD="align: right"]3-Mar-2018[/TD]
[TD="align: right"]11.505[/TD]
[/TR]
[TR]
[TD="align: right"]4-Mar-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]5-Mar-2018[/TD]
[TD="align: right"]12.281[/TD]
[/TR]
[TR]
[TD="align: right"]6-Mar-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]7-Mar-2018[/TD]
[TD="align: right"]11.505[/TD]
[/TR]
[TR]
[TD="align: right"]8-Mar-2018[/TD]
[TD="align: right"]11.375[/TD]
[/TR]
[TR]
[TD="align: right"]9-Mar-2018[/TD]
[TD="align: right"]12.152[/TD]
[/TR]
[TR]
[TD="align: right"]10-Mar-2018[/TD]
[TD="align: right"]12.67[/TD]
[/TR]
[TR]
[TD="align: right"]11-Mar-2018[/TD]
[TD="align: right"]11.375[/TD]
[/TR]
[TR]
[TD="align: right"]12-Mar-2018[/TD]
[TD="align: right"]11.505[/TD]
[/TR]
[TR]
[TD="align: right"]13-Mar-2018[/TD]
[TD="align: right"]11.375[/TD]
[/TR]
[TR]
[TD="align: right"]14-Mar-2018[/TD]
[TD="align: right"]11.116[/TD]
[/TR]
[TR]
[TD="align: right"]15-Mar-2018[/TD]
[TD="align: right"]11.375[/TD]
[/TR]
[TR]
[TD="align: right"]16-Mar-2018[/TD]
[TD="align: right"]12.67[/TD]
[/TR]
[TR]
[TD="align: right"]17-Mar-2018[/TD]
[TD="align: right"]11.116[/TD]
[/TR]
[TR]
[TD="align: right"]18-Mar-2018[/TD]
[TD="align: right"]12.799[/TD]
[/TR]
[TR]
[TD="align: right"]19-Mar-2018[/TD]
[TD="align: right"]11.505[/TD]
[/TR]
[TR]
[TD="align: right"]20-Mar-2018[/TD]
[TD="align: right"]11.505[/TD]
[/TR]
[TR]
[TD="align: right"]21-Mar-2018[/TD]
[TD="align: right"]11.505[/TD]
[/TR]
[TR]
[TD="align: right"]22-Mar-2018[/TD]
[TD="align: right"]12.929[/TD]
[/TR]
[TR]
[TD="align: right"]23-Mar-2018[/TD]
[TD="align: right"]12.67[/TD]
[/TR]
[TR]
[TD="align: right"]24-Mar-2018[/TD]
[TD="align: right"]12.022[/TD]
[/TR]
[TR]
[TD="align: right"]25-Mar-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]26-Mar-2018[/TD]
[TD="align: right"]11.763[/TD]
[/TR]
[TR]
[TD="align: right"]27-Mar-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]28-Mar-2018[/TD]
[TD="align: right"]12.152[/TD]
[/TR]
[TR]
[TD="align: right"]29-Mar-2018[/TD]
[TD="align: right"]12.67[/TD]
[/TR]
[TR]
[TD="align: right"]30-Mar-2018[/TD]
[TD="align: right"]11.116[/TD]
[/TR]
[TR]
[TD="align: right"]31-Mar-2018[/TD]
[TD="align: right"]12.152[/TD]
[/TR]
[TR]
[TD="align: right"]1-Apr-2018[/TD]
[TD="align: right"]11.262[/TD]
[/TR]
[TR]
[TD="align: right"]2-Apr-2018[/TD]
[TD="align: right"]11.31[/TD]
[/TR]
[TR]
[TD="align: right"]3-Apr-2018[/TD]
[TD="align: right"]11.893[/TD]
[/TR]
[TR]
[TD="align: right"]4-Apr-2018[/TD]
[TD="align: right"]11.375[/TD]
[/TR]
[TR]
[TD="align: right"]5-Apr-2018[/TD]
[TD="align: right"]11.116[/TD]
[/TR]
[TR]
[TD="align: right"]6-Apr-2018[/TD]
[TD="align: right"]11.375[/TD]
[/TR]
[TR]
[TD="align: right"]7-Apr-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]8-Apr-2018[/TD]
[TD="align: right"]12.799[/TD]
[/TR]
[TR]
[TD="align: right"]9-Apr-2018[/TD]
[TD="align: right"]11.375[/TD]
[/TR]
[TR]
[TD="align: right"]10-Apr-2018[/TD]
[TD="align: right"]11.246[/TD]
[/TR]
[TR]
[TD="align: right"]10-Apr-2018[/TD]
[TD="align: right"]11.246[/TD]
[/TR]
[TR]
[TD="align: right"]10-Apr-2018[/TD]
[TD="align: right"]12.767[/TD]
[/TR]
[TR]
[TD="align: right"]11-Apr-2018[/TD]
[TD="align: right"]12.799[/TD]
[/TR]
[TR]
[TD="align: right"]11-Apr-2018[/TD]
[TD="align: right"]11.375[/TD]
[/TR]
[TR]
[TD="align: right"]12-Apr-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]12-Apr-2018[/TD]
[TD="align: right"]12.67[/TD]
[/TR]
[TR]
[TD="align: right"]13-Apr-2018[/TD]
[TD="align: right"]11.375[/TD]
[/TR]
[TR]
[TD="align: right"]14-Apr-2018[/TD]
[TD="align: right"]11.246[/TD]
[/TR]
[TR]
[TD="align: right"]15-Apr-2018[/TD]
[TD="align: right"]11.116[/TD]
[/TR]
[TR]
[TD="align: right"]16-Apr-2018[/TD]
[TD="align: right"]11.165[/TD]
[/TR]
[TR]
[TD="align: right"]17-Apr-2018[/TD]
[TD="align: right"]11.246[/TD]
[/TR]
[TR]
[TD="align: right"]18-Apr-2018[/TD]
[TD="align: right"]11.634[/TD]
[/TR]
[TR]
[TD="align: right"]19-Apr-2018[/TD]
[TD="align: right"]11.505[/TD]
[/TR]
[TR]
[TD="align: right"]20-Apr-2018[/TD]
[TD="align: right"]12.67[/TD]
[/TR]
[TR]
[TD="align: right"]21-Apr-2018[/TD]
[TD="align: right"]12.411[/TD]
[/TR]
[TR]
[TD="align: right"]22-Apr-2018[/TD]
[TD="align: right"]11.116[/TD]
[/TR]
[TR]
[TD="align: right"]23-Apr-2018[/TD]
[TD="align: right"]11.375[/TD]
[/TR]
[TR]
[TD="align: right"]24-Apr-2018[/TD]
[TD="align: right"]11.116[/TD]
[/TR]
[TR]
[TD="align: right"]25-Apr-2018[/TD]
[TD="align: right"]11.116[/TD]
[/TR]
</tbody>[/TABLE]
 

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The slope is going to be in units of X. Since your X is dates (i.e., Excel Dates), the number might look strange.

When I applied the formulas you show to your data, I got an intercept of 43423.233 and a slope of -21.5666, which are wrong. When I reverse the Xs and Ys, and applied =INTERCEPT(B2:B113,A2:A113) it reported 497.262, and =SLOPE(B2:B113,A2:A113) reported -0.01124

I graphed the data and included a linear trend line with the equation shown on the chart and that is exactly what it reports: Y=-.0112x+497.26
 
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