1.3.2.4a - PED calculation

Calculate price elasticity of demand.

Use a - ped calculation to connect the rule to the data and decision in the question.

This matters because a - ped calculation determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply a - ped calculation to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: a - PED calculation is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.