To find the class width for the histogram, we need to determine the width of each interval along the x-axis. Each interval or "class" is defined by its range, from the lower limit to the upper limit.

Analyzing the Histogram:

The x-axis represents the "Number of People in 10 min," with the class intervals labeled as follows:

• 110 to 120
• 120 to 130
• 130 to 140
• 140 to 150

Calculating the Class Width:

The class width is the difference between the upper limit and the lower limit of any class interval.

Let's use the first class interval:

• Lower limit: 110
• Upper limit: 120

$\text{Class Width} = 120 - 110 = 10$

Therefore, the class width for this histogram is 10.

Would you like more details or have any questions? Here are some related questions:

1. What is the total frequency represented by this histogram?
2. How do you find the midpoint of each class interval?
3. What is the purpose of a histogram in representing data?
4. How would you calculate the relative frequency for each class?
5. Can you determine the mode of the dataset from the histogram?

Tip: Remember that the class width should be consistent across all intervals in a histogram for accurate representation.