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Use the relationship graphed at right to answer the questions below.

  1. Is the relationship a function?

    Does there appear to be more than one y-value for each value of ?

    Yes, it is a function.

  2. What is the domain?

    Look at the -intercepts on the graph.

  3. What is the range?

    Look at the lowest and highest points on the graph.

This is a sine curve that starts at (negative 6, comma 0) increases to (negative 3, comma 4), decreases to (0, comma 0), decreases to (3, comma negative 4), and increases to the end at (6, comma 0).