The problem provides a line graph that shows the number of phone calls received by a technical support line each day of the week (Friday to Thursday). The goal is to find the mean (average) number of phone calls received per day.

1. Problem Description

The problem provides a line graph that shows the number of phone calls received by a technical support line each day of the week (Friday to Thursday). The goal is to find the mean (average) number of phone calls received per day.

2. Solution Steps

Step 1: Read the number of calls for each day from the graph.

Friday: 50

Saturday: 50

Sunday: 65

Monday: 75

Tuesday: 65

Wednesday: 90

Thursday: 40

Step 2: Calculate the sum of the number of calls received each day.

$Sum = 50 + 50 + 65 + 75 + 65 + 90 + 40$

$Sum = 435$

Step 3: Calculate the mean by dividing the sum by the number of days, which is

7. $Mean = \frac{Sum}{Number\,of\,days}$

$Mean = \frac{435}{7}$

$Mean \approx 62.14$

3. Final Answer

62.14