Hi, See below as x is to be the time from "2010" ...
Year Average salary
2001 $1,360,000 |Using the point-slope formula,
1991 $262,000 m = 1,098,000 /10 = 109,800
Using the standard slope-intercept form for an equation of a line y = mx + b
where m = 109,800 is the slope and b the y-intercept.
s(x) = 109,800x + b
262,000 = 109,800*1 + b
152,200 = b
s(x) = 109,800x + +152,200
s(15) = 109,800*15 + 152,200
s(20) = 109,800*20 + 152,200