Answer
The statement makes sense.
Work Step by Step
RECALL:
In the linear function $f(x) = mx + b$, $m$ is the slope or (average rate of change in $f(x)$ or $y$ for every unit increase in $x$), and $b$ is the y-intercept (value of the function when $x=0$).
The equation that models the annual cost has a slope of $0.61$ and a y-intercept of $3500$.
A y-intercept of $3500$ means that when the car is not used, the annual cost is $\$3500$.
A slope is an average rate of change, so a slope of $0.61$ means that for every mile driven, the annual cost increases by $\$0.61$.
Therefore, the given statement makes sense.
