Precalculus Examples

$y = \frac{7}{2} x$

Step 1

Combine $\frac{7}{2}$ and $x$ .

$y = \frac{7 x}{2}$

Step 2

Since the equation can be written in the form $y = k x$ , $y$ varies directly with $x$ and $k$ . The constant of variation, $k$ , is $\frac{7}{2}$ .

$\frac{7}{2}$

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