Question

Brandon enters a contest at the gym. He earns 1 point for his first workout. If he works out the next day, he earns double the points of the previous day. Brandon creates the graph to show the number of points that can be earned on the nth consecutive day of working out.

A graph shows day of workout labeled 1 to 10 on the horizontal axis and daily points earned on the vertical axis. A line increases from 1 to 7.

How many points will Brandon earn on day 8 if he works out each of the previous 7 days?

8
32
64
128

Answer 1

D

Explanation:

Answer 2

128

Explanation:

You start out with one point on day one. The second day, your points are doubled. Each day after that is doubled from the previous day. So, the second day, you have 2 points. Multiply that by 2 to get 4 for day three.

Day four:4 x 2 = 8.

Day five: 8 x 2 = 16.

Day six: 16 x 2 = 32

Day seven: 32 x 2 = 64

Day eight: 64 x 2 = 128