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 everyday in the first week, 10 minutes in the second week, 20 minutes in the third week, and 40 minutes in the fourth week.

This is the question and the answer options and I believe it is option A i'm not 100 % sure though

Which statement best describes the methods used by Amanda and Billy to increase the time they spent exercising? (1 point)

A. Amanda's method is linear because the number of minutes increased by an equal number every week.

B. Billy's method is linear because the number of minutes increased by an equal factor every week.

C. Both Billy's and Amanda's methods are exponential because the number of minutes increased by an equal factor every week.

D. Both Billy's and Amanda's methods are exponential because the number of minutes increased by an equal number every week.

example 2 – simplify: step 1: completely factor both the numerators and denominators of all fractions. step 2: change the division sign to a multiplication sign and flip (or reciprocate) the fraction after the division sign; essential you need to multiply by the reciprocal. step 3 : cancel or reduce the fractions.