Each week, Henri notes the number of units of gas used in his house together with the mean temperature outdoors. Ten of his results are shown in the table.
(a)[2]
On the grid, complete the scatter diagram. The first five results are already plotted for you.
(b)[1]
What type of correlation is shown by your scatter diagram?
(c)[1]
Draw a line of best fit across the grid.
(d)[1]
Use your line of best fit to estimate the number of units used in one week when the mean temperature outside is $7.6^\circ\text{C}$.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “5 accurately plotted points” …