Pre-Algebra Examples

$y = 400 {(1.03)}^{x}$

Step 1

Remove parentheses.

$y = 400 \cdot {1.03}^{x}$

Step 2

The given equation $y = 400 \cdot {1.03}^{x}$ can not be written as $y = k x^{2}$ , so $y$ doesn't vary directly with $x^{2}$ .

$y$ doesn't vary directly with $x$