NBT NBT Quantitative Literacy: Charts, Tables and Graphs 2 — Questions and Answers
Question 1: A pie chart represents a budget. If transport costs 72° of the circle, what percentage of the budget is spent on transport?
- 20% (Correct answer)
- 25%
- 72%
- 36%
Correct answer: 20%
Percentage = (72°/360°) × 100% = 20%.
Question 2: A line graph shows temperature falling from 28°C at noon to 16°C at midnight. What is the rate of change per hour over this 12-hour period?
- 1°C per hour decrease (Correct answer)
- 2°C per hour decrease
- 0.5°C per hour decrease
- 1.5°C per hour decrease
Correct answer: 1°C per hour decrease
Change = −12°C over 12 hours; rate = −12/12 = −1°C per hour (decrease of 1°C/h).
Question 3: A table shows distances between cities. Cape Town to Johannesburg = 1 400 km; Johannesburg to Durban = 600 km. How far is Cape Town from Durban via Johannesburg?
- 2 000 km (Correct answer)
- 800 km
- 2 600 km
- 1 400 km
Correct answer: 2 000 km
Total distance = 1 400 + 600 = 2 000 km.
Question 4: A bar chart shows learner numbers: Grade 10 = 300, Grade 11 = 250, Grade 12 = 200. What proportion of learners are in Grade 12?
- 26.7% (Correct answer)
- 25%
- 28.6%
- 33.3%
Correct answer: 26.7%
Total = 750; Grade 12 proportion = 200/750 × 100% ≈ 26.7%.
Question 5: A stacked bar chart shows that in March, Category A = 40 units and Category B = 60 units, for a total of 100. What percentage is Category A?
- 40% (Correct answer)
- 60%
- 33%
- 67%
Correct answer: 40%
Category A proportion = 40/100 × 100% = 40%.
Question 6: A scatter plot shows a strong positive correlation between study hours and test scores. What does this suggest?
- As study hours increase, test scores tend to increase (Correct answer)
- Study hours cause higher test scores
- Test scores determine study hours
- Study hours and test scores are unrelated
Correct answer: As study hours increase, test scores tend to increase
A positive correlation means both variables tend to increase together, though correlation does not imply causation.
Question 7: A table of exchange rates shows: 1 USD = R18.50. How many US dollars can you get for R925?
- 50 USD (Correct answer)
- 25 USD
- 100 USD
- 500 USD
Correct answer: 50 USD
R925 ÷ R18.50 per USD = 50 USD.
NBT NBT Quantitative Literacy: Charts, Tables and Graphs 2
A pie chart represents a budget.
If transport costs 72° of the circle, what percentage of the budget is spent on transport?