Question

The cable company charges $30 to install new supplies at your house. Each month the cable bill is $75. What equation models the total cost for cable over time?

Answer 1

What is the slope of the line that contains points (2,9) and (8,7)?

Answer 2

x is the amount of months
y is the total bill

75x +30 = y

This is because 30 dollars is a one time fee so you will only add it once. 75 dollars is a recurring fee, so you pay it every month. Y is the total cost for cable.