Question

2.A cell phone company charges $50 for the phone plus a monthly service charge of $30. The

equation y 30x2 50 gives the cost y after x months. What is the rate of change of the
equation?

Answer 1

o find total, we'll need to add all the costs! There's the cost for the phone which is paid once, monthly fee for all the months you use it.

total = 50 + (30 × months )

In this case, the question wants the equation in x and y, so we can plug those in:

y = 50 + 30x

Explanation: