NBT NBT Quantitative Literacy: Charts, Tables and Graphs 4

Question 1

A table shows that a cell phone plan costs R199/month plus R0.80 per minute for calls over 100 minutes. In a month where 150 minutes were used, the total bill is:

Accepted Answer

R239

Answer

Extra minutes = 50; extra cost = 50 × R0.80 = R40; total = R199 + R40 = R239.

Question 2

A pie chart shows spending: food 45%, rent 30%, transport 15%, and savings 10%. If total income is R8 000, how much is saved?

Accepted Answer

R800

Answer

10% of R8 000 = R800.

Question 3

A line graph has a steeper gradient between points A and B than between B and C. What does this indicate?

Accepted Answer

The rate of change was faster between A and B

Answer

A steeper gradient means a faster rate of change over that interval, regardless of the actual values.

Question 4

A two-way table shows 200 survey responses. 80 males prefer tea, 40 females prefer coffee. If there are 110 males total, how many males prefer coffee?

Accepted Answer

30

Answer

Males preferring coffee = 110 total males − 80 who prefer tea = 30.

Question 5

A histogram is different from a bar chart because:

Accepted Answer

It shows continuous data with no gaps between bars

Answer

A histogram represents continuous data with bars touching (no gaps), unlike bar charts which show discrete categories.

(NBT) National Benchmark Test Practice Test

(NBT) National Benchmark Test Practice Test

NBT NBT Quantitative Literacy: Charts, Tables and Graphs 4