Question

John is deciding on how many lecture courses to take for his first semester. If three courses are worth 12 credits and five courses are worth 20 credits, what is the rate of change of the number of credits per course?

4 credits per course

-4 credits per course

8 credits per course

-8 credits per course

Answer 1

(3,12)(5,20)
rate of change (slope) = (y2 - y1) / (x2 - x1)
slope = (20 - 12) / (5 - 3)
slope = 8/2 = 4 credits per course

Answer 2

4 credits per course