Question

Bob is trying to decide what phone plan to use. AT&T costs 40 per month and 5.50$ per gigabyte of data. Verizon offers a plan of 65$ with unlimited data. What data usage would be the break even for the plan, that is, for how much data use would two plans cost the same?

Answer 1

With the information given we can set the following equations:

$\begin{gathered} 40+x(5.50)=\text{Total AT\&T} \\ 65=\text{Total Verizon} \end{gathered}$

Where x is the number of gigabytes used.

To know how much data use would the two plans cost the same we set:

$40+x(5.50)=65$

and solve for x:

$x=\frac{65-40}{5.50}=4.55$

Therefore, the data use for the two plans to be the same cost has to be 4.55 gygabytes.