precalculus help

Question

The phone company A Fee and Fee has a monthly cellular plan where a customer pays a flat monthly fee and then a certain amount of money per minute used on the phone. If a customer uses 250 minutes, the monthly cost will be $94.5. If the customer uses 600 minutes, the monthly cost will be $182.

A) Find an equation in the form y=mx+b, where x is the number of monthly minutes used and y is the total monthly of the A Fee and Fee plan.

Answer: y= 

 

Do not use any commas in your answer.

B) Use your equation to find the total monthly cost if 967 minutes are used.

Answer: If 967 minutes are used, the total cost will be___  dollars.

Answer 1

Start with two-point form from Algebra 1

(y - 94.5) / (x - 250) = (182 - 94.5) / (600 - 250)