The scatter diagram presents the speaking test scores together with the writing test scores for 15 students. The vertical axis carries the label "Writing test score" and the horizontal axis carries the label "Speaking test score".
(a)[1]
One student had a writing test score that was much higher than their speaking test score. Put a ring around this point on the scatter diagram.
(b)[1]
What kind of correlation is displayed by the scatter diagram?
(c)[1]
Draw a line of best fit across the scatter diagram.
(d)[1]
Use your line of best fit to estimate his speaking test score.
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The correct point is $(9, 14)$” …