Which graph does not represent y as a function of x? a) answer choice a b) answer choice b c) answer choice c d) answer choice d

"A" because two sides of the line are one the same x-axis. (I'm really bad at explaining )

Using the definition of a function, it is found that graph A does not represent a function.

---------------------------------

The definition of a function is that one value of the output is attributed to each value of the input.If a value of the input is related to more than one output, it will not be a function.In a graph, the input is x and the output is y.Looking at the graphs given, it can be seen that in graph A, for values of , there are 2 values of y, that is, two outputs are mapped to one input, which means that it is not a function.

A similar problem is given at link

D has rotational symmetry