ITBS Data Interpretation and Graphs 2 — Questions and Answers
Question 1: A line graph shows a store's sales rising from $200 on Monday to $350 on Friday. What is the total increase in sales over this period?
- $100
- $150 (Correct answer)
- $200
- $350
Correct answer: $150
The increase is $350 − $200 = $150.
Question 2: A pie chart shows that 40% of students chose soccer, 30% chose basketball, and 30% chose baseball. If there are 200 students total, how many chose basketball?
- 40
- 60 (Correct answer)
- 80
- 90
Correct answer: 60
30% of 200 = 0.30 × 200 = 60 students.
Question 3: A double bar graph compares boys' and girls' test scores. Boys averaged 78 and girls averaged 85. How much higher was the girls' average?
- 5
- 6
- 7 (Correct answer)
- 8
Correct answer: 7
85 − 78 = 7 points higher.
Question 4: A pictograph uses one symbol to represent 5 books. If a student has 4 symbols next to her name, how many books did she read?
- 4
- 10
- 15
- 20 (Correct answer)
Correct answer: 20
4 symbols × 5 books each = 20 books.
Question 5: A table shows test scores for three students: Ana=92, Ben=85, Cara=91. What is the range of their scores?
- 5
- 6
- 7 (Correct answer)
- 8
Correct answer: 7
Range = highest − lowest = 92 − 85 = 7.
Question 6: A bar graph shows rainfall: Jan=3 in, Feb=5 in, Mar=4 in, Apr=6 in. Which month had the most rainfall?
- January
- February
- March
- April (Correct answer)
Correct answer: April
April had 6 inches, the highest bar on the graph.
Question 7: A scatter plot shows points clustered closely around a line going up from left to right. This pattern indicates:
- No correlation
- Negative correlation
- Positive correlation (Correct answer)
- Random data
Correct answer: Positive correlation
Points rising from left to right show a positive correlation between the two variables.
ITBS Data Interpretation and Graphs 2
A line graph shows a store's sales rising from $200 on Monday to $350 on Friday.
What is the total increase in sales over this period?