QS4—Standard graphical forms

Construct and interpret a range of standard graphical forms.

Use qs4—standard graphical forms to connect the rule to the data and decision in the question.

This matters because qs4—standard graphical forms determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply qs4—standard graphical forms to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: QS4—Standard graphical forms is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.