Question

An equation was used to predict the number of possible enrollments in an afterschool program for the first 6 months of the year. The actual enrollments are also listed.

Actual enrollment 55 80 95 100 115 90
Predicted enrollment 75 80 85 90 95 100


The sum of the residuals is ______.

Answer 1

70

Explanation:

75-55=20

95-85=10

100-90=10

115-95=20

100-90=10

sum of the differences is 70

Answer 2

A: 10

Explanation:

Let's add the actual enrollments all together. 55 + 80 + 95 + 100 + 115 + 90 all added together is 535. The predicted enrollments, all added together, is: 75 + 80 + 85 +90 +95 + 100 = 525.

535 - 525 = 10 residuals.