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7-99.

If , find the value of the expressions in parts (a) through (c) below. Then complete parts (d) through (f). 7-99 HW eTool (Desmos). Homework Help ✎

  1. Substitute −1 for x and simplify.

    f(−1) = 3(2)−1

  1. Refer to part (a).

  1. Refer to part (a).

  1. What value of x gives f(x) = 12?

    Substitute 12 for f(x) and solve for x.

    x = 2

  2. Where does the graph of this function cross the x-axis? The y-axis?

    A function crosses the x-axis at y = 0, and a function crosses the y-axis at x = 0.

  3. If , find .

Use the eTool below to find the value of each expression in parts (a) through (c).
Click on the link at right for the full eTool version: CCA 7-99 HW eTool