NBT NBT Quantitative Literacy: Charts, Tables and Graphs 1 — Questions and Answers
Question 1: A bar chart shows monthly sales: Jan = R12 000, Feb = R15 000, Mar = R9 000. By how much did sales change from February to March?
- Decreased by R6 000 (Correct answer)
- Increased by R6 000
- Decreased by R3 000
- Increased by R3 000
Correct answer: Decreased by R6 000
Sales went from R15 000 in Feb to R9 000 in Mar, a decrease of R6 000.
Question 2: A pie chart shows that 40% of students chose Mathematics, 35% chose Science, and the rest chose History. What percentage chose History?
- 25% (Correct answer)
- 15%
- 30%
- 75%
Correct answer: 25%
100% − 40% − 35% = 25% chose History.
Question 3: A line graph shows a company's profit rising steadily from R200 000 in 2019 to R500 000 in 2023. What is the average annual increase?
- R75 000 (Correct answer)
- R100 000
- R60 000
- R50 000
Correct answer: R75 000
Total increase = R300 000 over 4 years; average annual increase = R300 000 ÷ 4 = R75 000.
Question 4: A table shows that a shop sold 120 units at R25 each. What is the total revenue shown in the table?
- R3 000 (Correct answer)
- R300
- R145
- R30 000
Correct answer: R3 000
Total revenue = 120 × R25 = R3 000.
Question 5: In a dual bar chart comparing two schools' results, School A scored 72% and School B scored 84% in Mathematics. What is the difference?
- 12 percentage points (Correct answer)
- 16 percentage points
- 8 percentage points
- 6 percentage points
Correct answer: 12 percentage points
84% − 72% = 12 percentage points difference.
Question 6: A graph shows population growth. In 2000, the population was 4 million; by 2020, it was 6 million. What is the percentage increase?
- 50% (Correct answer)
- 33%
- 25%
- 150%
Correct answer: 50%
Percentage increase = (2/4) × 100% = 50%.
Question 7: A frequency table shows that 15 learners scored between 60–69, 25 scored 70–79, and 10 scored 80–89. What fraction of learners scored 70 or above?
- 7/10 (Correct answer)
- 1/2
- 5/10
- 3/5
Correct answer: 7/10
Total learners = 50; 70 or above = 25 + 10 = 35; fraction = 35/50 = 7/10.
NBT NBT Quantitative Literacy: Charts, Tables and Graphs 1
A bar chart shows monthly sales: Jan = R12 000, Feb = R15 000, Mar = R9 000.
By how much did sales change from February to March?