CPM Homework Help : A2C Problem 12-136

An exponential function has an asymptote at $y = −10$ and passes through the points $\left(2, 8\right)$ and $\left(4, 30.5\right)$ . Find its equation.

Hint:

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

Hint 2:

What do you know is the value of $k$ ?

More Help:

Use the given points to find $a$ and $b$ .