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→Key Stage 4
: A single line is drawn on a '''scatter graph''' called a [[Line of Best Fit|line of best fit]].
: The [[Line of Best Fit|line of best fit]] may be a straight line or a curved line that shows a trend in the data.
===Examples===
{| class="wikitable"
|-
|[[File:ScatterGraphStraight.png|center|300px]]
|[[File:ScatterGraphCurve.png|center|300px]]
|-
| style="height:20px; width:300px; text-align:center;" |This '''scatter graph''' shows a [[Positive Correlation|positive correlation]] with a straight [[Line of Best Fit|line of best fit]] which goes through zero, showing the relationship is [[Directly Proportional|directly proportional]].
| style="height:20px; width:300px; text-align:center;" |This '''scatter graph''' shows a [[Negative Correlation|negative correlation]] with curved [[Line of Best Fit|line of best fit]] showing the relationship is [[Inversely Proportional|inversely proportional]].
|}