Question

*Hyla has been keeping track of the changes in his savings account for the past few weeks.

Week
Change to Savings (S)
$21.25
$16.90
-$13.63
$31.16
-$5.03
POSSIBLE POINTS: 5.88
Hyla decides to add the amounts from the table and divide by 5 to find the average weekly change in his savings. Then he will multiply this amount by 52 to predict the total amount saved or spent over 1 year. Using this method, what is the total amount that Hwan predicts he will save or spend?

Answer 1

predicted savings: $526.76

Explanation:

You want the predicted amount Hyla will save or spend in a year, computed as 52 times the average of changes in his savings over few weeks.

Average change

The average change in Hyla's savings is the sum of changes divided by the number of changes:

average weekly change = (21.25 +16.90 -13.63 +31.16 -5.03)/5 = 10.13

Then the predicted change for the year is ...

52 × 10.13 = 526.76

The total amount Hyla predicts he will save is $526.76.

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