Choose the best definition for domain. a. the inputs of a relation b. the outputs of relation c. the movement of a graph either vertically or horizontally d. a special relation where every input has one output

Hi there!

I like to think of the domain and range as coordinates, so think of the domain as the x value, or the input, and the range as the y value, or the output.
So, b wouldn't work because of what I just explained.
C could be defined as slope.
And d won't work because this would be defined as a function.

So the only answer left would be a. the inputs of a relation (but just know that domain is also the input of a function)

I hope I helped!