CBSE Class 7 · Artificial Intelligence · 2026-27

Data Visualization: Worksheet

Skills: Abstraction, Pattern recognition. Circle the correct answer. Show your working in the space beside each question.

Which chart best shows how the temperature changed each day over a month?
- (a) Line graph
- (b) Pie chart
- (c) Table of names
- (d) Word cloud
You want to compare how many students chose each sport. Which chart fits best?
- (a) Bar graph
- (b) Line graph
- (c) Scatter plot
- (d) Map
Which chart best shows what share of a family’s monthly budget goes to food, rent, travel and savings?
- (a) Pie chart
- (b) Line graph
- (c) Scatter plot
- (d) Number line
A pie chart shows cricket 40%, football 25%, kabaddi 20% and badminton. What percentage is badminton?
- (a) 10%
- (b) 15%
- (c) 20%
- (d) 25%
A bar graph’s vertical axis starts at 90 instead of 0. Two bars show 92 and 96. What is the problem?
- (a) The small difference looks much bigger than it is
- (b) The graph is perfectly fair
- (c) The bars are the wrong colour
- (d) Nothing can be read from it
You want to see whether students who study more hours get higher marks. Which chart helps most?
- (a) Scatter plot
- (b) Pie chart
- (c) Single bar
- (d) Pictograph of books

Answer key: Data Visualization

(a) Line graph – So a line graph is best.
(a) Bar graph – A bar graph fits best.
(a) Pie chart – So a pie chart fits best.
(b) 15% – Badminton is 15%.
(a) The small difference looks much bigger than it is – A cut axis exaggerates differences: a common way graphs mislead.
(a) Scatter plot – A scatter plot shows relationships like this.