### Home > CC4 > Chapter 8 > Lesson 8.2.3 > Problem 8-121

8-121.

An exponential function of the form that passes through the points

*8-121 HW eTool*(Desmos). Homework Help ✎

What is the equation of the function?

Read Math Notes box in Lesson 8.2.2 on curve fitting an exponential function.

Create two equations using the points

and .

Equation:

Equation: Isolate

for both equations. Use the Equal Values Method to solve for.Substitute

into one of the original equations, and solve for.Use the equation to sketch a graph of the function.

Use the eTool below to help solve the problem.

Click the link at the right to view full version of the eTool: Int1 8-121 HW eTool.