An item that sells for 14599 has a sales tax of 1022 a Find

An item that sells for $145.99 has a sales tax of $10.22. a. Find a mathematical model that gives the amount of sales tax y in terms of the retail price x. b. Use the model to find the sales tax on a purchase that has a retail price x.

Solution

Solution

a:

The rate is given by

10.22 / 145.99 = .07 or 7%

So y = 0.07 x Answer