I do not understand how to find x on a graph when there is no equation. I have the possible answers: a) x= -3, b) x=-1, c) x=5, d) x=1

Question

I do not understand how to find x on a graph when there is no equation. I have the possible answers: a) x= -3, b) x=-1, c) x=5, d) x=1

It asks me to find the value of x when y=5

Answer 1

y = 5 is an equation for a horizontal line. x can have any value along that line

If you were given a graph with a line drawn on it that is not horizontal , you will have to use that graph to get a unique value for x. An equation can be figured out from the graph.