Constructing scatter graphs | Maths | Quizalize & Oak National Academy

Starter quiz

Which line is horizontal?
- A
- B ✓
- C
Which point on the graph has the coordinates (8, 2)?
- A
- B
- C
- D ✓
What are the coordinates of the point marked on this graph?
- '(5, 3)' ✓
What is the value of $a$ on the horizontal axis?
- '100' ✓
What is the value of $a$ on the vertical axis?
- '50' ✓
______ are a set of information which shows counts or measurements.
- 'data' ✓

Data which has two variables that are paired together is called ______ data.
- 'bivariate' ✓
Which is another term to describe the explanatory variable in bivariate data?
- dependent variable
- independent variable ✓
- response variable
Which two terms describe a measure in bivariate data whose value is predicted to be affected by the other measure?
- dependent variable ✓
- explanatory variable
- independent variable
- response variable ✓
Which variable should be represented on vertical axis of a scatter graph?
- dependent variable ✓
- independent variable
A set of bivariate data measures children's ages and shoe sizes. Which variable is most likely to be the dependent variable?
- age
- shoe size ✓
Look at the second column in the table. Which scatter graph has chosen the most appropriate scale to plot this data?

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Task B Q2 - Pupils may choose to go up in 100s on the vertical axis.

Highlight that all of their data points will be in the bottom half of the graph and suggest going up in 50s.

Scatter graph - A visual representation for bivariate data. It can be useful when determining the nature of the relationship between the two variables.
Independent/explanatory - An independent (explanatory) variable is a measure that is predicted to have an effect on another variable
Dependent/response - A dependent (response) variable is a measure whose value is predicted to be affected by an explanatory variable
Bivariate data - Bivariate data has two variables, where each data point for one variable has a corresponding data point for the other variable.