Question

The table below shows the cost of riding in a taxi cab. What is the rate of change?

Answer 1

Choose any 2 points from the table:

*10----------------------$25
*15----------------------$35
*20----------------------$45
*25----------------------$55

and find the slope of the line.  Supposing we focus on

*15----------------------$35
*20----------------------$45

then:
                     $45-$35         $10
slope = m = ------------- = ---------- = $2/mile
                       20-15              5