https://file.aiquickdraw.com/mathbot/file/1733339112273hz3r19tx.jpg

Let's analyze the histogram and solve the questions:

### Observations from the histogram:
1. The histogram has four intervals: 
   - **9 to 19**
   - **20 to 30**
   - **31 to 41**
   - **42 to 52**

2. The heights of the bars represent the frequency (number of stores).

---

#### (a) **What is the class width?**

The class width is the difference between the lower limit of one class and the lower limit of the next class.

\[
\text{Class Width} = 20 - 9 = 11
\]

---

#### (b) **How many stores sold from 42 to 52 tablets?**

From the histogram, the height of the bar for the interval **42 to 52** is **6**.

So, **6 stores** sold tablets in this range.

---

#### (c) **How many stores sold 41 or fewer tablets?**

To find the total number of stores that sold 41 or fewer tablets, sum the frequencies for the intervals **9 to 19**, **20 to 30**, and **31 to 41**.

From the histogram:
- **9 to 19:** 2 stores
- **20 to 30:** 10 stores
- **31 to 41:** 5 stores

Total:
\[
2 + 10 + 5 = 17
\]

So, **17 stores** sold 41 or fewer tablets.

---

### Final Answers:
- **(a)** Class width = **11**
- **(b)** 6 stores
- **(c)** 17 stores

---

Would you like me to explain the method in more detail or answer related questions? 

### Related Questions:
1. How do we calculate class midpoints for the intervals?
2. What is the total number of stores represented in the histogram?
3. What is the relative frequency for each interval?
4. How would the histogram change if the class width were smaller?
5. How can this data be converted into a cumulative frequency graph?

### Tip:
Always verify the consistency of class intervals in histograms to ensure accurate calculations.

What is the class width? How many stores sold from 42 to 52 tablets? How many stores sold 41 or fewer tablets?

Learn how to interpret a histogram, calculate class width, and determine the frequency for specific intervals. This guide provides step-by-step solutions, such as identifying class width (11), calculating stores that sold 42-52 tablets (6 stores), and summing frequencies for stores selling 41 or fewer tablets (17 stores).

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