Question

Samantha created part of a table to show her savings. She saved at the same rate each week.

Samantha’s Savings
Week
1
2
3
4
Money Saved

$18
$24


Which graph shows this relationship?
On a coordinate plane, a graph titled Weekly Savings has weeks on the x-axis and money saved on the y-axis. Points (1, 8), (2, 16), (3, 18), and (4, 24) are plotted.

On a coordinate plane, a graph titled Weekly Savings has weeks on the x-axis and money saved on the y-axis. Points (1, 6), (2, 12), (3, 18), and (4, 24) are plotted.

On a coordinate plane, a graph titled Weekly Savings has weeks on the x-axis and money saved on the y-axis. Points (1, 9), (2, 18), (3, 18), and (4, 24) are plotted.

On a coordinate plane, a graph titled Weekly Savings has weeks on the x-axis and money saved on the y-axis. Points (1, 0), (2, 9), (3, 18), and (4, 24) are plotted.

Answer 1

Between week 3 and week 4 her total goes from $18 to $24, an increase of $6 in one week. So her savings increase by $6 each week. That gives totals: week 1 = $6, week 2 = $12, week 3 = $18, week 4 = $24. The graph with points (1,6), (2,12), (3,18), (4,24) is correct.