What is the difference in sales tax if a product cost $500 is brought in a city with a 6.75% sales tax rate versus a city with a 7.25 sales tax rate
a. 0.25
b. 2.50
c. 25.00
d. 250.00

In order to find Sales Tax, you have to multiply the price of the product and the sales tax.
500*.0675=33.75
500*.0725=36.25
From here, you subtract the two sale taxes in order to find your answer.
36.25-33.75=2.5
So the answer to this problem is B. 2.50.

The vertex of the quadratic function is (1.5, -.75)