Precalculus Examples

$y = \frac{5}{3} x^{2}$

Step 1

Combine

$\frac{5}{3}$ and

$x^{2}$ .

$y = \frac{5 x^{2}}{3}$

Step 2

Since the equation can be written in the form

$y = k x^{2}$ ,

$y$ varies directly with

$x^{2}$ and

$k$ . The constant of variation,

$k$ , is

$\frac{5}{3}$ .

$\frac{5}{3}$

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$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$