Answer: 6
Step-by-step explanation:
to find the average rate of change between two points, use the formula
(y2 - y1) / (x2 - x1)
since they ask for the values between 3 and 5, x1 = 3, x2 =5
find y1 and y2 from the chart
y1 = 9, y2 = 21
plug in values to solve
(y2 - y1) / (x2 - x1)
= (21-9)/(5-3)
= 12/2
= 6
