(2 marks available) The scatter diagram shows the scores of 10 students
in their paper 1 and paper 2 Maths GCSE exams.
1007
A line of best fit has been drawn.
90
80
a) What type of correlation is shown
by the graph?
701
N 60
paper 2
50
b) A pupil who scored 50 in his paper 1
exam got ill and missed paper 2.
40
30
24=
Use the line of best fit to predict what
his paper 2 mark could have been.
20
10
10 20 30 40 50 60 70 80 90 106
paper 1
available