The question is
What is the constant in the expression?
we know that
![c=0.05m+12](https://img.qammunity.org/2019/formulas/mathematics/high-school/r87lkfgrf1nc0h96vmzdbyvrsozg0nc0zk.png)
where
c---------> the cost of Janelle’s cell phone bill
m-------> represents the number of minutes of use
-------> represent the cost per minute (slope of the linear equation)
-------> represent the constant in the expression
therefore
the answer is
The constant is 12