Question

Amanda exercised for 10 minutes every day in the first week, 20 minutes in the second week, 30 minutes in the third week, and 40 minutes in the fourth week.

Billy exercised for 5 minutes every day in the first week, 10 minutes in the second week, 20 minutes in the third week, and 40 minutes in the fourth week.

Which statement best describes the methods used by Amanda and Billy to increase the time they spent exercising?

Answer 1

Given is :

Amanda exercised for 10 minutes every day in the first week, 20 minutes in the second week, 30 minutes in the third week, and 40 minutes in the fourth week. This shows each week she adds 10 minutes more.

So, her method is linear because each week the same number of minutes are increasing.

Billy exercised for 5 minutes every day in the first week, 10 minutes in the second week, 20 minutes in the third week, and 40 minutes in the fourth week. This shows that Billy is increasing double time(multiplied by 2) or his method is exponential.

Answer 2

Billy doubles the amount of time they work out.

Amanda adds 10 minutes each week

So what ever statement you have that shows that, would be the correct one.

You didn't list what the statements were.