Is this relation a function? Justify your answer.
11
10
8
7
.
8 9 10 11
A. Yes, because every - and y-value is positive.
B. No, because two points with the same yvalue have different x-
values.
C. Yes, because every x-value corresponds with a single yvalue.
D. Yes, because the number of x-values is the same as the number of
y values.