Bar graph displaying the number of girls in classes 5 through 9, showing Class 9 has the highest count.

I'll analyze this bar graph problem step by step.

Looking at the bar graph:
- The y-axis shows "No. of Girls in class" with a scale where 1 unit length = 5 girls
- The x-axis shows different classes: Class 5, Class 6, Class 7, Class 8, and Class 9

Let me read the values for each class by looking at the height of each bar:

Class 5: The bar reaches 30 on the y-axis → 30 girls

Class 6: The bar reaches 35 on the y-axis → 35 girls

Class 7: The bar reaches 20 on the y-axis → 20 girls

Class 8: The bar reaches 25 on the y-axis → 25 girls

Class 9: The bar reaches 40 on the y-axis → 40 girls

Now let me verify these readings are correct by checking the scale. The note says "1 unit length = 5 girls", and the y-axis is marked in increments of 5 (5, 10, 15, 20, 25, 30, 35, 40, 45), so my readings are accurate.

Common questions that might be asked about this data:

1. Which class has the most girls? - Class 9 with 40 girls
2. Which class has the least girls? - Class 7 with 20 girls
3. What is the total number of girls across all classes? - 30 + 35 + 20 + 25 + 40 = 150 girls
4. What is the difference between the class with most and least girls? - 40 - 20 = 20 girls

Since no specific question was asked, I'll provide the complete data interpretation.

Final Answer:
Number of girls in each class:
- Class 5: 30 girls
- Class 6: 35 girls
- Class 7: 20 girls
- Class 8: 25 girls
- Class 9: 40 girls

Total number of girls across all classes: 150