How to find the possible input (x) when the output is given (y) IN A GRAPH.

Step-by-step explanation:

The graph has plotted points. The (x) is how far you go left or right on the x axis from zero. The (y) is how far up or down you go on the y axis. Each plotted point has an address. (3,-1). This point is 3 to the right of zero and one down.

b.-4 units

all you   do is count how many times you move