regression lines
What regression lines means in Mathematics A-Level, as defined for Pearson Edexcel, WJEC.
Definitions of regression lines
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Reference: WJEC
The least-squares line y = a + bx modelling how the dependent response variable y changes in response to the independent explanatory variable x.
Summarises a linear trend, allowing a prediction of one variable from the other within the observed range.
Topics that use regression lines
- Data presentation and interpretation (Pearson Edexcel A-Level)
- Data presentation and interpretation (AS Unit 2: Applied Mathematics A) (WJEC A-Level)
Related terms
- Frequency density
- probability density
- relative frequency
- scatter diagrams
- standard deviation
- Summary statistics
- bivariate interpretation
- box plot conventions
Using regression lines in the exam
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