A farm food supplier monitors the number of hens kept (x) against the weekly consumption of hen food (y kg) for a sample of 10 small holders. He records the data and works out the regression line for y on x to be y = 0.16 +0.79%. a Write down a practical interpretation of the figure 0.79. b Estimate the amount of food that is likely to be needed by a small holder who has 30 hens. c If food costs 12 for a 10 kg bag estimate the weekly cost of feeding 50 hens.

AppendixLO1