The number y of calories burned after x minutes of kayaking is represented by the linear function y=4.5x . The graph shows the number of calories burned by hiking.


a. Which activity burns more calories per minute?
A) kayaking
B) hiking
Question 2

b. You perform each activity for 45 minutes. How many total calories do you burn?
You burn 472.5 calories.

Question 3
Justify your answer.

The number y of calories burned after x minutes of kayaking is represented by the linear function y45x The graph shows the number of calories burned by hiking a class=