Final answer:
To represent the cost per mile as a function of the number of miles traveled, use the equation c = 0.30m + 125.
Step-by-step explanation:
To write an equation that represents the cost per mile as a function of the number of miles traveled, we can start by identifying the variables involved. In this case, the dependent variable is the cost per mile (c), and the independent variable is the number of miles traveled (m). Based on the given information, we know that the rental cost is $125 plus $0.30 per mile.
So, the equation that represents the cost per mile (c) as a function of the number of miles traveled (m) can be written as:
c = 0.30m + 125