Exponential Functions (AQA A-Level Mathematics): Flashcards

$y = a \cdot b^x$

$b > 1$

$0 < b < 1$

All real numbers ($x \in \mathbb{R}$)

$y = a$

$2.718$

$y = e^x$

Usually at $y = 0$ (the x-axis)

$y = y_0 \cdot e^{kt}$ where $k > 0$

$y = y_0 \cdot e^{-kt}$ where $k > 0$