### Home > INT3 > Chapter 8 > Lesson 8.3.2 > Problem8-115

8-115.

An exponential function has an asymptote at $y = 5$ and passes through the points $\left(2, 5.64\right)$ and $\left(–1, 15\right)$. What is the equation of the function?

Use $y = ab^{x} + k$.

$y = 4\left(0.4\right)^{x} + 5$