Question 1206448
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A relationship is NOT a function if there are any cases where a given x value has two different y values.<br>
 A. 
(-5,0), (5,3), (-7,1), (5,5)
x=5 has two different y values, 3 and 5  -->  NOT a function<br>
 B. 
(-5,4), (5,6), (-5,3), (2,2)
x=-5 has two different y values, 4 and 3  -->  NOT a function<br>
 C. 
(-5,4), (4,6), (-5,3), (1,2)
x=-5 has two different y values, 4 and 3  -->  NOT a function<br>
 D. 
(-5,5), (5,3), (-7,2), (2,3)
All the x values are different, so there is no way that there can be two different y values for any x value.  This is a function.<br>
ANSWER: D<br>