NBT NBT Quantitative Literacy: Charts, Tables and Graphs 7 — Questions and Answers
Question 1: A cumulative frequency table shows that 48 out of 80 learners scored below 60%. What percentage scored 60% or above?
- 40% (Correct answer)
- 60%
- 48%
- 20%
Correct answer: 40%
Scored 60% or above = 80 − 48 = 32; percentage = 32/80 × 100% = 40%.
Question 2: A broken-line graph shows stock prices. The graph has a gap (break) in the y-axis starting from 0. This is likely intended to:
- Emphasise small differences between prices (Correct answer)
- Show that data is missing
- Indicate the prices are zero for that period
- Show a non-linear scale
Correct answer: Emphasise small differences between prices
Breaking the y-axis allows small differences to look more dramatic by zooming in on the relevant range.
Question 3: A table shows that a machine produces 45 items per hour. How many hours does it take to produce 630 items?
- 14 hours (Correct answer)
- 45 hours
- 585 hours
- 28 hours
Correct answer: 14 hours
Time = 630 ÷ 45 = 14 hours.
Question 4: A bar chart compares male and female voter turnout across three provinces. Province B shows the greatest gap between male and female turnout. This means:
- The difference between male and female turnout is largest in Province B (Correct answer)
- Province B has the most voters overall
- Province B has the highest female turnout
- Province B has the lowest male turnout
Correct answer: The difference between male and female turnout is largest in Province B
The largest gap between the two bars in Province B means male and female turnout differ the most there.
Question 5: A pie chart has 6 equal sectors. Each sector represents:
- 60° (Correct answer)
- 45°
- 72°
- 90°
Correct answer: 60°
360° ÷ 6 = 60° per sector.
Question 6: A table shows meal prices at a restaurant. A student buys 2 mains at R85 each and 1 dessert at R45. What is the total, including a 10% tip?
- R236.50 (Correct answer)
- R215
- R225.50
- R250
Correct answer: R236.50
Subtotal = R85 × 2 + R45 = R215; 10% tip = R21.50; total = R215 + R21.50 = R236.50.
Question 7: A line graph shows temperature (°C) over 24 hours. The temperature is highest at 14:00 and lowest at 05:00. This is an example of what kind of pattern?
- Diurnal (daily) cycle (Correct answer)
- Annual cycle
- Random fluctuation
- Linear trend
Correct answer: Diurnal (daily) cycle
A regular pattern of highs and lows within a 24-hour period is called a diurnal (daily) cycle.
NBT NBT Quantitative Literacy: Charts, Tables and Graphs 7
A cumulative frequency table shows that 48 out of 80 learners scored below 60%.
What percentage scored 60% or above?