maybe think of this as two points on a graph (x,y) = (32,17) and (91,50) with y measured in thousands and x=0 as 1920

calculate the slope: (50-17)/(91-32) = 33/59= m

y=mx + b

y=(33/59)x + b where b is the y intercept. plug in either point to solve for b

17 = (33/59)(32) + b

b = 17 - (32)(33/59) = about -18 + 17 = -1

b=-1

y= (33/59)x-1

in 2030, t = 110 and y=(33/59)110 -1 = 3630/59-1 = about $61,524 income in 2030

150 = (33/59)x -1

151 = 33x/59

x = (59/33)151 = about 270 = 1920 + 270 = the year 2190