Question 974333
2.3 is our slope m of the line
we need to calculate the V intercept (V at year 0) which is
184.5 - (11*2.3) =
184.5 - 25.3 = 159.2
this means at year 0, V was 159.2 and therefore our equation is
V = 2.3y + 159.2
now we want to know V after 20 years
V = 2.3(20) + 159.2 
V = 46 + 159.2
V = 205.2
After 20 years there are 205.2 million residents of voting age