Aubrey bought a pair of boots that cost
$72 before sales tax. The sales tax was
7%. What was the total cost of the boots?

$77.04

Step-by-step explanation:

All you want to do here is add 7% of 72 which you can easily do with the equation 72(1.07) = x. X represents the total cost, in the equation you're adding 7%.

the function makes a strait line horizontally with no x intercept but a y intercept at 9.