The line graph shows the cost of inflation. What cost $10,000 in 1967 would cost the amoun...

The line graph shows the cost of inflation. What cost $10,000 in 1967 would cost the amount shown by the graph in subsequent years. (The symbol  on the horizontal axis shows that there is a break in values between 0 and 80. Thus, the first tick mark on the horizontal axis represents 1980.)

Here are two mathematical models for the data shown by the graph. In each formula, C represents the cost x years after 1980 of what cost $10,000 in 1967.

Use these models to solve Exercise

Use model 1 to determine in which year the cost will be $80,483 for what cost $10,000 in 1967.