New
New
Year 8

Constructing scatter graphs

I can construct scatter graphs from data presented in a number of different ways.

New
New
Year 8

Constructing scatter graphs

I can construct scatter graphs from data presented in a number of different ways.

Lesson details

Key learning points

  1. Data presented as a paired list can be represented as a scatter graph.
  2. Data presented in a table can be represented as a scatter graph.
  3. The independent variable is placed on the horizontal axis.

Keywords

  • 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.

Common misconception

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.

Explain that scatter graphs could be plotted using either points or crosses. Ones made on computers tend to use points. When plotting by hand, pupils may find it easier to plot crosses so they can be seen easily.
Teacher tip

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Lesson video

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6 Questions

Q1.
Which line is horizontal?
An image in a quiz
A
Correct answer: B
C
Q2.
Which point on the graph has the coordinates (8, 2)?
An image in a quiz
A
B
C
Correct answer: D
Q3.
What are the coordinates of the point marked on this graph?
An image in a quiz
Correct Answer: (5, 3), (5,3), (5 , 3), (5 ,3)
Q4.
What is the value of $$a$$ on the horizontal axis?
An image in a quiz
Correct Answer: 100, one hundred, a hundred
Q5.
What is the value of $$a$$ on the vertical axis?
An image in a quiz
Correct Answer: 50, fifty
Q6.
are a set of information which shows counts or measurements.
Correct Answer: data

6 Questions

Q1.
Data which has two variables that are paired together is called data.
Correct Answer: bivariate, Bivariate, BIVARIATE
Q2.
Which is another term to describe the explanatory variable in bivariate data?
dependent variable
Correct answer: independent variable
response variable
Q3.
Which two terms describe a measure in bivariate data whose value is predicted to be affected by the other measure?
Correct answer: dependent variable
explanatory variable
independent variable
Correct answer: response variable
Q4.
Which variable should be represented on vertical axis of a scatter graph?
Correct answer: dependent variable
independent variable
Q5.
A set of bivariate data measures children's ages and shoe sizes. Which variable is most likely to be the dependent variable?
age
Correct answer: shoe size
Q6.
Look at the second column in the table. Which scatter graph has chosen the most appropriate scale to plot this data?
An image in a quiz
An image in a quiz
Correct Answer: An image in a quiz
An image in a quiz
An image in a quiz