18N.2.SL.TZ0.S_2

pestleMathematicsAISLPaper 218N· sl-4-4-pearsons-scatter-diagrams-eqn-of-y-on-xsource ↗

The following table shows the hand lengths and the heights of five athletes on a sports team.

The relationship between x and y can be modelled by the regression line with equation y = ax + b.

Another athlete on this sports team has a hand length of 21.5 cm. Use the regression equation to estimate the height of this athlete.

Markscheme / solution

substituting x = 21.5 into their equation (M1)

eg 9.91(21.5) − 31.3

181.755

182 (cm) A1 N2

[2 marks]

Examiners’ report

[N/A]