**"Interpret and report data"**

## Grades 9 to 12 A Richer World?

*By toni On 4 August, 2017 · Leave a Comment*

The graph and table show the Gross Domestic Products (GDP) of the world’s top ten economies in 2016 and the forecast for 2030.

Draw a double bar chart to compare the GDPs for these eleven countries.

Which countries were in the top ten in one of these […]

## Grades 6 to 10 Drinking Water

*By toni On 15 July, 2017 · Leave a Comment*

This United Nations Childrens’ Fund pie chart shows the global locations of 783 million people who did not have safe drinking water in 2012 and this number is increasing.

The total world population in 2017 is 7.5 billion (7,500,000,000). What percentage of the world population is without safe drinking water?

The world […]

## Grades 10 to 12 Land and Sea Statistics

*By toni On 15 July, 2017 · Leave a Comment*

The table gives data on the land and sea covering the Earth’s surface.

Explain how the percentage 69.03% of saltwater that makes up the Earth’s surface is calculated from these figures.

How would you use this percentage to find the angle for saltwater for drawing a pie chart?

A pie chart and […]

## Grades 8 to 11 – M, M and M

*By toni On 23 November, 2016 · 7 Comments*

Can you find all the sets of five positive whole numbers that have

a mean of 4

a median of 3

and a mode of 3?

One solution is 3, 3, 3 ,5 and 6 and there are several other solutions.

When you have found some solutions make […]

## Grades 7 to 10 Car Racing

*By toni On 23 November, 2016 · Leave a Comment*

The graph shows the distance along a race track for two racing cars as they approach a bend in a race. Copy the table below, take readings from the graph and fill in the table for the first 10 seconds.

How far does each car go in the 3rd second? How far […]

## Grades 7 to 10 Best Representation

*By toni On 18 October, 2016 · Leave a Comment*

The ages of children arriving at a zoo in 1 hour are noted by the ticket salesman. There are 12 children between 0 and 3 years old, 14 children between 4 and 10 years old and 48 between 11 and 18 years old.

He draws a bar graph or frequency diagram to represent this […]

## Grades 7 to 10 Match the Matches

*By toni On 18 October, 2016 · Leave a Comment*

Two teams Alpha United and Beta Rovers have each played 15 matches.

The data shows how many goals the teams scored in their matches.

There are six sets of data, three showing the results for Alpha United and three for Beta Rovers.

Match the data to the teams and explain your answers.

See the […]

## Grades 9 to 12 SA Demographics

*By toni On 17 October, 2016 · Leave a Comment*

The table gives the 2013 population statistics for South Africa.

Complete the table and draw a histogram to represent this data. Comment on the distribution.

Remember that for a histogram the area in each column represents the frequency for that class.

You can see that almost half the population is under 25 years old. […]

## Grades 7 to 10 Histogram

*By toni On 17 October, 2016 · Leave a Comment*

The histogram shows the number of children in each age group on a school bus. There are no children under 5 years and no children over 17 years. There are 6 children aged between 5 and 10 years . Explain why the class boundaries are 5, 11, 16 and 18. Complete the following table. […]

## Grades 4 to 9 – Ice Cream Pie

*By toni On 27 July, 2016 · 4 Comments*

Xolile sells ice cream and the pie chart shows the sales for last week.

What fraction of the ice creams sold were strawberry? If she sold 60 strawberry ice creams how many ice creams were sold altogether.

The number of vanilla ice creams and the number of chocolate ice creams sold were the same.

[…]

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