Which set of ordered pairs in the form of (x, y) does not represent a function of x? {(-1,2), (3,-,,2} {(-1,-,,,2)} {(-1,,-,,5)} }(-1,,,-,0)}

For a relation to be a function it must be

relation is not a function.

In the above options, C is relation therefore cannot be a function.

The reason is that 3 alone maps onto -2 and 5, in the ordered pairs (3,-2) and (3,5). This disqualifies it from being a function.

Hence the graph of this relation will not pass the vertical line test