Chemistry A-Level
Line of best fit
What Line of best fit means in Chemistry A-Level, as defined for OCR.
Definition of Line of best fit
Check what you remember
Read the wording for your board, then hide it and explain Line of best fit in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
The straight line on which two widely separated points are chosen rather than data points, because this reduces the effect of random error.
Topics that use Line of best fit
- Analysis (OCR A-Level)
Related terms
- Choice of scale
- Consistent unit conversion
- Gradient
- Precision of measurement
- Reporting derived results
- Selecting the correct mathematical relationship
- Significant figures and standard form
- Units of gradient
Using Line of best fit in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Chemistry questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Chemistry A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge