Answer:
The left graph (horizontal line)
Step-by-step explanation:
We have two graphs at lines both at 4. But we need to figure out which one is y = 4, as another one is x = 4.
To figure this out, we have to know which is the x-axis and which is the y-axis. The horizontal axis is the x-axis and the vertical axis is the y-axis.
So we will look at where the line crosses an axis. If it's the x-axis or y-axis.
In the left graph, the line crosses the vertical axis, or the y-axis.
In the right graph, the line crosses the horizontal axis, or the x-axis.
And so the answer would be the left graph, as it crosses the y-axis. So that's y = 4.
