<PRE><B>Question 153210</B>
Is Y a function of d?
Ans: No, because d=2 has two corresponding y values: 1993 and 98
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Is d a function of y?
Ans: Yes, because each year has one corresponding d value.
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y 1993 94 95 96 97 98
d $2 $4 $3 $-2 $5 $2

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Cheers,
Stan H.
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