Mathematics for IGCSE & O level - Statistical Diagrams (Section 2 - No. 31)
Based on the key points, which of the following statements are true regarding a line of best fit?
It is a straight line drawn in the general direction of the points.
Points should be balanced on both sides.
It can be used to estimate one data value when given another.
It must pass through all data points.
Explanation
The key points state: 'A line of best fit is a straight line drawn in the general direction of the points, with points roughly balanced on both sides. The line of best fit can be used to estimate one data value when given another.' A line of best fit doesn't have to pass through all the points.
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