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CanadaON
Grade 8

5.05 Two-variable data

Interactive practice questions

Consider the following variables:

  • Number of ice cream cones sold
  • Temperature (°C)
a

Which of the following statements makes sense?

The temperature affects the number of ice cream cones sold.

A

The number of ice cream cones sold affects the temperature.

B
b

Which is the dependent variable and which is the independent variable?

The independent variable is the temperature and the dependent variable is the number of ice cream cones sold.

A

The independent variable is the number of ice cream cones sold and the dependent variable is temperature.

B
Easy
< 1min

Consider the following variables:

  • Ticket sales
  • Revenue from a show
Easy
< 1min

The scatter plot shows the relationship between sea temperature and the amount of healthy coral.

Easy
< 1min

For the following variables, choose the sets where one variable has an effect on the other. 

Select the three correct options.

Easy
< 1min
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Outcomes

8.D1.1

Identify situations involving one-variable data and situations involving two-variable data, and explain when each type of data is needed.

8.D1.2

Collect continuous data to answer questions of interest involving two variables, and organize the data sets as appropriate in a table of values.

8.D1.3

Select from among a variety of graphs, including scatter plots, the type of graph best suited to represent various sets of data; display the data in the graphs with proper sources, titles, and labels, and appropriate scales; and justify their choice of graphs.

8.D1.6

Analyse different sets of data presented in various ways, including in scatter plots and in misleading graphs, by asking and answering questions about the data, challenging preconceived notions, and drawing conclusions, then make convincing arguments and informed decisions.

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