Question

1. Who is correct?

What is the rate
of change shown in
the table below?
x                     y
3               13.5
6                  27
8              36
11             49.5
• Dylan says the rate of
change is 4.5.
• Rachel says the rate of
change is 13.5.
Who is correct, and why?

Answer 1

Dylan is correct 4.5

Answer 2

(3,13.5)(6,27)
slope = (27 - 13.5) / (6 - 3) = 13.5 / 3 = 4.5

so Dylan is correct...Rachel forgot to divide by 3