### Home > INT2 > Chapter 12 > Lesson 12.2.3 > Problem 12-109

12-109.

An exponential function is a function of the form

What is the equation of an exponential function that passes through the points

and ?

Substitute the points to get two equations.

Solve for *a* and *b*.

What does the

*b‑*value from part (a) tell you about the function?

Write a situation that could be modeled by this equation.

Starting value should be