The equation of the x-axis is y = 0.
This means that for any point on the x-axis, the value of y is always zero, regardless of the value of x. The x-axis is a horizontal line that runs through the origin (0,0) and extends infinitely to the left and right. Thus, every point on this line can be described with the y-coordinate equal to 0. If you’re graphing, you would simply draw a horizontal line along the x-axis to represent this equation.