AI generatedStatisticsKey Stage 3

Drawing a line of best fit

Drawing a line of best fit.

  • Plot paired observations as separate crosses. Do not join the points.
  • A best-fit line follows the overall trend, with points balanced around it.
  • Predictions are estimates. Extrapolation is less secure, and correlation alone does not establish causation.

Example 1

Draw a suitable line of best fit.

Coordinate graph1234567891011510152025300
Follow the overall trend, with points balanced above and below the line. Do not join successive points or force the line through the origin.
One suitable line is shown; small variations in a hand-drawn line are acceptable.
Coordinate graph1234567891011510152025300

Example 2

Draw a suitable line of best fit.

Coordinate graph12345678910115101520250
Follow the overall trend, with points balanced above and below the line. Do not join successive points or force the line through the origin.
One suitable line is shown; small variations in a hand-drawn line are acceptable.
Coordinate graph12345678910115101520250

Your turn

Question 1

Draw a suitable line of best fit.

Coordinate graph123456789101151015202530350
Check answer
Follow the overall trend, with points balanced above and below the line. Do not join successive points or force the line through the origin.
One suitable line is shown; small variations in a hand-drawn line are acceptable.
Coordinate graph123456789101151015202530350
Question 2

Draw a suitable line of best fit.

Coordinate graph12345678910115101520250
Check answer
Follow the overall trend, with points balanced above and below the line. Do not join successive points or force the line through the origin.
One suitable line is shown; small variations in a hand-drawn line are acceptable.
Coordinate graph12345678910115101520250
Question 3

Draw a suitable line of best fit.

Coordinate graph123456789101151015202530350
Check answer
Follow the overall trend, with points balanced above and below the line. Do not join successive points or force the line through the origin.
One suitable line is shown; small variations in a hand-drawn line are acceptable.
Coordinate graph123456789101151015202530350
Question 4

Draw a suitable line of best fit.

Coordinate graph12345678910115101520250
Check answer
Follow the overall trend, with points balanced above and below the line. Do not join successive points or force the line through the origin.
One suitable line is shown; small variations in a hand-drawn line are acceptable.
Coordinate graph12345678910115101520250
Question 5

Draw a suitable line of best fit.

Coordinate graph1234567891011510152025300
Check answer
Follow the overall trend, with points balanced above and below the line. Do not join successive points or force the line through the origin.
One suitable line is shown; small variations in a hand-drawn line are acceptable.
Coordinate graph1234567891011510152025300
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