# How do you determine if the equation y = (7)^x represents exponential growth or decay?

Let $y = a \cdot {b}^{x}$ be an exponential function.
• Increasing if ($a > 0$ and $b > 1$) or ($a < 0$ and b in (0;1))
• Decreasing if: ($a > 0$ and b in (0;1)) or ($a < 0$ and $b > 1$)