Question

Zach read a book for 10 minutes every weekend in the first month, 20 minutes in the second month, 40 minutes in the third month, and 80 minutes in the fourth month.

Victoria read a book for 35 minutes every weekend in the first month, 50 minutes in the second month, 65 minutes in the third month, and 80 minutes in the fourth month.

Which statement best describes the methods used by Zach and Victoria to increase the time they spent reading a book?

Zach's method is linear because the number of minutes increased by an equal factor every month.

Answer 1

Victoria's method is linear because the number of minutes increased by an equal number every month.

Both Victoria and Zach's method is exponential because the number of minutes increased by an equal factor every month.

Both Victoria and Zach's method is exponential because the number of minutes increased by an equal number every month.

Answer 2

B, Victoria's is linear increasing by an equal number every month.

Answer 3

why b

Answer 4

If all you wanted was the answer without any steps then you got it.

Answer 5

no, that's not what i wanted @ranga

Answer 6

It was meant for people who jump in to provide answers forgetting the purpose is for the person posting the question to learn.

Answer 7

Zack's method is geometric, being multiplied by 2 every month

Answer 8

@ranga I'm aware to not give answers away, it violates the CoC. I was getting to the explanation.

Answer 9

okay.

Answer 10

Victoria's numbers are in arithmetic progression: Increases by the same amount each month. Therefore it is linear because rise / run is constant and that will be a straight line and hence linear.

Answer 11

Zach's numbers are increasing by geometric progression with a common ration of 2.
That means it is an exponential function. For Zach, the function is 5 * 2^x

Answer 12

So it is A