For explanation/ analysis (up to 4 marks)
For a fully accurate formula of PED and / or an explanation of what it measures in terms of the responsiveness / percentage change in quantity demanded compared to a change in price (1)
For an explanation that food and energy would be classed as essential/necessity goods and therefore price inelastic meaning that quantity demanded would be less responsive to a change in price / the fall in quantity demanded would be less than the increase in price (1)
For an explanation that poorer households (including fixed income households) would suffer a great detrimental / negative effect because their income does not rise in line with inflation and / or they are unlikely to be in a position to negotiate for higher wages (1)
For an explanation that this situation can only be overcome if e.g., government support is made available to assist poorer households with the rising prices of food and energy. (1)
ALTERNATIVELY, the 4th mark can be given for a comparison to higher income households who will probably be in a position to either negotiate for income increases in line with inflation OR absorb the rising prices of food and energy.
For evaluation
That clearly assesses the extent of the impact solely on lower income households e.g., by considering the amount of possible government assistance possible, the degree to which such households can compensate for the price rises etc., Reserve 1 mark for a justified conclusion.
OR
That clearly assesses the relative impact on different types of households (including high-income households) by considering e.g., the proportion of income spent on food and energy together with their ability to negotiate for higher pay. Reserve 1 mark for a justified conclusion.
Please use a text box to show the mark split e.g., 3,1