The line graph shows the cost of inflation in some country W

The line graph shows the cost of inflation in some country. What cost $10,000 in 1975 would cost the amount shown by the graph in subsequent years. Below are two mathematical models for the data shown in the graph. In each formula, C represents the cost x years after 1980 of what cost $10,000 in 1975. Answer parts a through c

Use model 1 to determine the cost in 2000 of what cost $10,000 in 1975.

Model 1

C=931x + 15,160

Model 2

C= -2x^2 =998x+14,305

Solution

x= number of years after 1980.

So for the year 2000, x= 2000-1980 = 20 years.

Substitute this in model 1,

C = 931(20) + 15,160 = $33,780