D1.5.2 - Graphical solution of two variable problems

Graphical solution of two variable problems using ruler and vertex methods.

Use graphical solution of two variable problems to connect the rule to the data and decision in the question.

This matters because graphical solution of two variable problems determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply graphical solution of two variable problems to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: Graphical solution of two variable problems is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.