Eight metal ingots were chosen at random and measurements were made of their breaking strength (x) and their hardness (y). The results are shown in the table below. x (tonne/cm) 5 7 7.4 6.8 5.4 7 6.6 6.4 y (hardness units) 50 70 85 70 75 60 65 60 a Draw a scatter diagram to represent these data. b Describe and interpret the correlation between the variables 'hardness' and 'breaking strength'.

AppendixLO1