Scatter graphs

• Mathematics
• Lower Secondary (Key Stage 3)

Scatter graphs

What is a scatter graph? 

• A scatter graph is a good way of displaying two sets of data. 
• They help us to see if there is a connection or a correlation between the two sets of data. 

Skills to learn: 

1. Plotting a scatter graph (practise on MyMaths)
2. Drawing a line of best fit (in the correct direction through the plots and ensuring there are an even number of plots on each side)
3. Describing the relationship between 2 sets of data on a scatter graphreferring to both data sets. 
4. Using a scatter graph to predict an outcome and know how to show this on the graph (by drawing lines) 

Plotting a scatter graph 

Watch the video and later you will practise on MyMaths

Drawing a line of best fit 

In the correct direction through the plots and ensuring there are an even number of plots on each side.

Describing the relationship between 2 sets of data on a scatter graph

You must make sure that you refer to both data sets.

Activity

In pairs,  describe the trend lines in each graph

Estimating with a scatter graph

Using a scatter graph to predict an outcome and know how to show this on the graph (by drawing lines) 

Activities

Handouts: draw line of best fit and describe relationship in each graph

MyMaths lesson on Scatter graphs

app.mymaths.co.uk