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2-72.

Find the equation of an exponential function that passes through each pair of points. 2-72a HW eTool (Desmos) and 2-72b HW eTool (Desmos). Homework Help ✎

  1. and

    Use the equation to help you here. Begin by substituting one of the points for and .

    Next, substitute the other ordered pair for and .

    Use substitution, and solve for .

    Now, solve for .

  1. 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