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→Key Stage 3
: 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]]
| style="height:20px; width:300px; text-align:center;" |This '''scatter graph''' shows a [[Positive Correlation|positive correlation]] and the [[Line of Best Fit|line of best fit]] is straight and goes through zero, showing the relationship is [[Directly Proportional|directly proportional]].
|}
==Key Stage 4==