Cab companies often charge a flat fee for picking up someone and then an additional fee per mile driven.

The city of Charlotte NC, charges $2.50 fee and $2.50 per mile for each cab ride
4. What does the y-intercept mean (in words) in the context of this problem? Hint: What do you pay when you step into the cab?

In the context of this problem, the y-intercept represents the fee that you have to pay when you step into the cab.