Question 1132960
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The number of &nbsp;"-9" &nbsp;is &nbsp;12 &nbsp;units away from the number of &nbsp;"3", &nbsp;so there are exactly &nbsp;TWO &nbsp;PERIODS&nbsp; distance between them.

Therefore, f(-9) = f(3) = -1.      <U>ANSWER</U>



The number of &nbsp;"20" &nbsp;is &nbsp;12 &nbsp;units away from the number of &nbsp;"8", &nbsp;so there are exactly &nbsp;TWO &nbsp;PERIODS &nbsp;distance between them.

Therefore, f(20) = f(8) = 5.       <U>ANSWER</U>
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All questions answered.  &nbsp;&nbsp;The problem is fully solved and completed.