Accedmychevron_right11thchevron_rightmathchevron_rightTheory Of Quadratic Functionschevron_rightExercise 3.2

Key idea

When total money is fixed:

(quantity)×(rate)=constant(\text{quantity})\times(\text{rate})=\text{constant}

A change in quantity and rate often produces a rational equation that reduces to a quadratic after clearing denominators.