For a sample of vehicles, the regression line predicting fuel use f f\,f litres from distance d d\,d km is f=0.071d+1.8f=0.071d+1.8f=0.071d+1.8, using distances from 12 km to 240 km.
Interpret both coefficients.
Estimate the fuel use for 180 km.
Critique a prediction for 500 km.
105 exam-style questions on WJEC A Level Maths 2.2 Data presentation and interpretation, covering 2.2.1 Data presentation and interpretation, 2.2.2 Data presentation and interpretation, 2.2.3 Data presentation and interpretation, 2.2.4 Data presentation and interpretation, 2.2.5 Data presentation and interpretation, 2.2.6 Data presentation and interpretation, 2.2.7 Data presentation and interpretation, 2.2.8 Data presentation and interpretation, and 2.2 Data presentation and interpretation. Each one has a worked solution and a mark scheme showing where the marks go.