WJEC A-Level Business 601-5238-2
Enterprise and Starting a Business
Markets and Market Research
Marketing
People in Business
Operations Management
Business Finance and Accounts
Business Analysis and Decision-Making
Strategy and Implementation
Managing Change and Risk
The External Environment
Business Analysis and Decision-Making
Correlation, scatter graphs and extrapolation
- 3 things to know
- A2 Unit 3
Overview
Scatter graph used for in business analysis, line of best fit and positive correlation.
What you need to know
Answer each one before you reveal it.
Describe what would be plotted on a scatter graph relating advertising to sales.
Describe positive correlation.
Questions from this subtopic
Each one with the model answer underneath.
- 1
What is a scatter graph used for in business analysis?
Model answer
A scatter graph plots paired values of two variables against each other to show whether a relationship exists between them.
- 2
Describe what would be plotted on a scatter graph relating advertising to sales.
Model answer
Advertising spending would be plotted on the horizontal axis and sales revenue on the vertical axis, with one point for each period.
- 3
What is a line of best fit?
Model answer
A line of best fit is a straight line drawn through the middle of the plotted points so that it represents the general relationship between the two variables.
- 4
Describe positive correlation.
Model answer
Positive correlation means the two variables move in the same direction, so the points rise from left to right.
- 5
Describe negative correlation.
Model answer
Negative correlation means the two variables move in opposite directions, so the points fall from left to right.
- 6
Describe what a scatter graph looks like when there is no correlation.
Model answer
The points are scattered randomly with no discernible upward or downward pattern, so no meaningful line of best fit can be drawn.
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