NBT Quantitative Literacy Data and Graphs

Question 1

A bar graph shows monthly rainfall in Cape Town: Jan 15mm, Feb 17mm, Jun 93mm, Jul 82mm. Which month had the highest rainfall?

Accepted Answer

June

Answer

June recorded 93mm, the largest value shown, so it is the wettest month in the data.

Question 2

A pie chart shows a household budget: Rent 40%, Food 25%, Transport 20%, Other 15%. If the total monthly income is R12 000, how much is spent on rent?

Accepted Answer

R4 800

Answer

Rent is 40% of R12 000. 0.40 x 12 000 = R4 800.

Question 3

A table lists test scores: 60, 72, 72, 80, 96. What is the mode of these scores?

Accepted Answer

72

Answer

The mode is the most frequent value. 72 appears twice while all others appear once, so the mode is 72.

Question 4

A line graph shows a learner's marks rising from 45% in Term 1 to 63% in Term 4. What is the total percentage-point increase?

Accepted Answer

18 points

Answer

The increase is 63% - 45% = 18 percentage points.

Question 5

A dataset of five values is 4, 6, 6, 8, 11. What is the mean (average)?

Accepted Answer

7

Answer

Sum = 4+6+6+8+11 = 35. Mean = 35 / 5 = 7.

National Benchmark Test (NBT) Practice Test

National Benchmark Test (NBT) Practice Test

NBT Quantitative Literacy Data and Graphs