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To find the **modal interval** from the histogram, we need to identify the interval with the highest frequency (the tallest bar). 

Observing the histogram:
- The intervals are represented on the x-axis as ranges of "No. of passengers," with counts on the y-axis.
- Each interval has a certain count (or frequency) associated with it.

The counts for each interval are:
- 400–500: 4
- 500–600: 6
- 600–700: 12
- 700–800: 16
- 800–900: 8
- 900–1000: 2

The highest frequency (16) occurs in the interval **700–800**.

### Answer:
The **modal interval** is **700–800**, as it has the highest frequency.

Would you like further details on how to interpret this or have any other questions?

Here are five related questions that expand on this topic:
1. How do you calculate the mean from a histogram?
2. What is the median interval in this histogram?
3. How can you estimate the range of passenger numbers per week from this histogram?
4. What is the total number of observations represented in this histogram?
5. How would the histogram change if the modal interval had double the count?

**Tip:** The modal interval in a histogram is always the interval with the highest frequency, making it useful for understanding the most common values in the data set.

Learn how to identify the modal interval in a histogram showing passenger data for a minibus. By analyzing the highest frequency interval, we find that the modal interval is 700-800. This problem is perfect for students in Grades 6-8 looking to understand basic statistical concepts.

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