Page 45 - BA2 Integrated Workbook - Student 2017
P. 45
Analysing and predicting costs
Scatter graph method
3.1 Drawing a scatter graph
The scatter graph (line of best fit) draws a graph using all available historical data.
The result is known as a scatter diagram, scatter graph or sometimes a scatter plot
and is a visual way of determining if there might be a (linear) relationship between
Where a clear relationship can be seen, a line of best fit can be drawn by eye. This
is the line which, in the judgement of the user, appears to be the best representation
of the gradient of the sets of points on the graph.
y
ion
x
This line can be used to predict the outcome at different levels of activity
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