The graph shows the number of pages Erin read each month from October to February. We are asked to find the mean of the number of pages read during these months.

1. Problem Description

The graph shows the number of pages Erin read each month from October to February. We are asked to find the mean of the number of pages read during these months.

2. Solution Steps

First, we need to determine the number of pages read in each month by reading the values from the graph:

October: 100 pages

November: 80 pages

December: 100 pages

January: 70 pages

February: 50 pages

Next, we need to find the sum of the number of pages read across all the months:

$100 + 80 + 100 + 70 + 50 = 400$

Finally, we divide the sum by the number of months (which is 5) to find the mean:

$\text{Mean} = \frac{\text{Sum of pages}}{\text{Number of months}} = \frac{400}{5}$

$\text{Mean} = 80$

3. Final Answer

80