9. TOLL ROADS Some toll highways assess tolls based on where a car
entered and exited. The table shows the highway tolls for a car
entering and exiting at a variety of exits. Assume that the toll for the
reverse direction is the same.
Entered Exited Toll
Exit 8 Exit 10 $0.25
Exit 10 Exit 15 $1.00
Exit 15 Exit 18 $0.50
Exit 18 Exit 22 $0.75
a. Julio travels from Exit 8 to Exit 15. Which quantity is equivalent to
Exit 8 to Exit 15?
b. What property would you use to determine the toll?