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Use your graphs from problem 1-17 to answer the questions below.

  1. How can the graph for the rule be used to predict the result for an input (-value) of ? How can the graph be used to predict the output (-value) associated with an input of ?

    Trace up from . What is the -value of the point?

    Trace up from .

    Trace over to the -axis to find the -value.

    Trace over to the -axis to find the -value.

  2. If you wanted an output of for the rule , what would you need as an input?

    What is the -value when ?

  3. For each of the rules in parts (a) through (e) of problem 1-17, where does the graph cross the -axis? Describe any patterns you notice.

    Compare the points where the graphs cross the -axis with their equations.

In the eTool below complete the table for each part to graph each rule.
Click the link at right for the full version of the eTool: 1-19 HW eTool