Please Help!

1. If you take a Uber and they charge $5 just to show up and $1.57 per mile, how much will it cost you to go 12 miles? (Assume no tip.)

a. Create an equation from the information above.

b. Identify the slope in the equation?

c. Calculate the total cost of the ride?

2. With the same charges as #1, how many miles could you go with $50, if you also gave a $7.50 tip? (Challenge Question! Hint, you only have a $50, exactly, with you.)