### Home > CCA2 > Chapter 2 > Lesson 2.1.5 > Problem 2-72

2-72.

Find the equation of an exponential function that passes through each pair of points.

and Use the equation

to help you here. Begin by substituting one of the points forand.Next, substitute the other ordered pair for

and.Use substitution, and solve for

.Now, solve for

.

and Look at the hints in part (a).

Use the eTool below to help you solve part (a).

Click the link at right for the full version of the eTool: *CCA2 2-72a HW eTool*

Use the eTool below to help you solve part (b).

Click the link at right for the full version of the eTool: *CCA2 2-72b HW eTool*