Alex has an IQ of 118. Use the line of best fit on the diagram to estimate Alex's mark in the general knowledge test.
12
13
14
Sheena scored 17 in the general knowledge test. Use the line of best fit on the diagram to estimate Sheena's IQ.
122
123
124
Ahmed scored 16 in the Maths test but missed the Science test.
Use the equation of the line of best fit to obtain an approximate score for Ahmed in the Science test.
18
18.5
19
Bobby scored 37 in the Maths test but missed the Science test.
Use the equation of the line of best fit to obtain an approximate score for Bobby in the Science test.
27.5
28
28.5
Scott scored 24 in the Science test but missed the Maths test.
Use the equation of the line of best fit to obtain an approximate score for Scott in the Maths test.
27