Question

graph $y = 0$.

Explanation:

Step1: Identify line type

The equation $y=0$ is a horizontal line.

Step2: Locate the line on axes

A horizontal line $y=0$ coincides with the x-axis, where every point has a y-coordinate of 0, extending infinitely left and right.

Step3: Correct the given graph

The existing graph shows $y=4$, which is incorrect. Replace it with the line along the x-axis (where $y=0$).

Answer:

The correct graph is the horizontal line coinciding with the x-axis (the axis where all points have a y-value of 0, extending infinitely in both positive and negative x-directions).