I am trying to determine the equation that best approximates the values in this table for converting raw scores in bridge to IMPs.
<tbody>
Up To
IMPs
Up To
IMPs
Up To
IMPs
10
0
420
9
1740
17
40
1
490
10
1990
18
80
2
590
11
2240
19
120
3
740
12
2490
20
160
4
890
13
2990...