Question

At Devon's new job he spent $12.99, $10.50, $9.89, $6.90, and $7.58 on lunch the first week.

Answer 1

The mean for the second week increased by $0.40.

The mean for the first week is found by adding the data points and dividing by 5:
(12.99+10.50+9.89+6.90+7.58)/5 = $9.57

Since the cost increased by $2 the second week, we add two to the data points before dividing by 5:
(12.99+10.50+9.89+6.90+7.58+2)/5 = $9.97

To find the increase in means, subtract them:
9.97-9.57 = $0.40.

Answer 2

Answer:

$0.40

Step-by-step explanation:

Did the test, K12