Bataar is working out how a car’s engine size relates to the distance it can travel on one gallon of fuel.
The measurements for 12 cars are shown in the table.
Engine size (cm$^3$): 1750, 2160, 1840, 2390, 1650, 2300, 1930, 2050, 1700, 2000, 2200, 1900
Distance (km): 80, 54, 78, 42, 90, 46, 66, 60, 84, 58, 73, 75
(a(i))[2]
Complete the scatter diagram. The first 8 points have already been plotted for you.
(a(ii))[1]
On the scatter diagram, draw your line of best fit.
(a(iii))[1]
What type of correlation is represented by the scatter diagram?
(b(i))[1]
Write down which distance is most likely to be incorrect.
(b(ii))[1]
Use your scatter diagram to estimate the car’s correct distance.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “All four points plotted correctly” …