1.3.3.1a - concept of 'supply'

The concept of 'supply'.

Use a - concept of 'supply' to connect the rule to the data and decision in the question.

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

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

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