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CAIE IGCSE Mathematics Core C9.5.3 Draw By Eye Interpret and Use a Straight Line of Best Fit Questions

Practise Core CAIE IGCSE Mathematics by drawing a line of best fit, estimating values from it and interpreting the fitted relationship in context.

Syllabus
2028–2030
Course
Mathematics 0580
Level
Core

Exam points

  • Draw a single straight line of best fit by inspection with an even distribution of points about the line.
  • Use a line of best fit to estimate an unobserved value from a scatter diagram.
  • Interpret the gradient and context of the fitted line while reporting estimates with sensible precision.

CAIE IGCSE Mathematics Core C9.5.3 Draw By Eye Interpret and Use a Straight Line of Best Fit Questions question 1

[Maximum number: 2]

A school records the marks students score in Paper 1 and Paper 2 of a subject.
The scatter diagram shows the scores for twelve students.

Figure for Question CAIE IGCSE Mathematics Core C9.5.3 Draw By Eye Interpret and Use a Straight Line of Best Fit Questions question 1 — CAIE IGCSE Mathematics Core

Question (a)

(a)

On the scatter diagram, draw a line of best fit.

[ 1 ]

Question (b)

(b)

Another student scores 35 on Paper 1.

Use your line of best fit to find an estimate for their score on Paper 2.

[ 1 ]
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