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An exponential function of the form that passes through the points and .   

  1. 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 .

  2. 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: 8-121 HW eTool