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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.

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Key term

What is a scatter graph used for in business analysis?

Key term

Describe what would be plotted on a scatter graph relating advertising to sales.

Key term

Describe positive correlation.

Questions from this subtopic

Each one with the model answer underneath.

  1. 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. 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. 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. 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. 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. 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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