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3-42.

If :

  1. Where does the graph of intersect the -axis?

    Substitute for , and solve for .

  2. Where does the graph of intersect the -axis?

    Substitute for , and solve for .

    You can factor and use the Zero Product Property once you write your equation.

    and

  3. If , what are the intercepts of the graph of ?

    Look at parts (a) and (b) to help find the intercepts.
    What do you notice about the equations? Are they related?

    -intercepts: ,
    -intercept:

  4. Compare the graphs of and .

    The graph of is units lower than the graph of .

  5. What is ?

    Subtract from . How does your answer relate to part (d)?