P4.3.1 - Parametric equations of curves and conversion between

Parametric equations of curves and conversion between cartesian and parametric forms.

Use parametric equations of curves and conversion between to connect the rule to the data and decision in the question.

This matters because parametric equations of curves and conversion between determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply parametric equations of curves and conversion between to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: use the formula and units given in the question, show the substitution and interpret the result; the calculation alone is not the conclusion.