### Home > A2C > Chapter 3 > Lesson 3.2.3 > Problem 3-122

3-122.

Find the equation of an exponential function that passes through the points

Substitute the values for and

*.*

Solve both equation for .

Set the equations equal to each other. Solve for *b* by multiplying both sides of the equation by .

Substitute into one of the equations from Step 1 and solve for

*. After you know*

*and*

*, write the equation.*