$y=4,000+20x$

Where $y$ is the annual cost and $x$ is the miles driven.

a$.$ If the car is driven $15,000$ miles this year, what is the forecasted cost of operating this automobile?

b$.$ If the car is driven $25,000$ miles this year, what is the forecasted cost of operating this automobile?

a$.$ $$7,001$

b$.$ $$8,000$

a$.$ $$7,000$

b$.$ $$9,000$

a$.$ $$7,000$

b$.$ $$6,000$

a$.$ $$5,000$

b$.$ $$9,000$