Which set of ordered pairs in the form (x, y) does not represent a function of x?
a {(-1,,-,,2)}
b. {(-12)}
c. {(-1,,-,,5)}
d. {(-1,,,-,0)}

If we are going to analyze the sets of ordered pairs listed above, we can easily spot which set of ordered pairs in the form of (x,y) that does not represent a function of x. If the first coordinates of each ordered pair are all different, then it is a function; but if the first coordinates have repeated numbers, then it is not. Therefore, the answer would be option C. Notice that 3 is repeated. Hope this helps.