Answer:
Step-by-step explanation:
We have Kevin's sales equation is
Step 1
Find out Dylan's sales equation
Find the slope
We need two points
We take
And 


Find the equation in slope intercept form

We have

point 
Substitute and solve for b


So

Therefore
Kevin's rate of change is 60
Dylan's rate of change is 55
Compare
Kevin's rate of change is greater than Dylan's rate of change because Kevin's sell 60 cars per year and Dylan's sells 55 cars per year.
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