What is another name for the line y = 0?
x-axis is another name for it.
Another name for the line y = 0 is the x-axis.
To understand why this is the case, it's necessary to know the basics of coordinate systems. In a two-dimensional Cartesian coordinate system, we have two axes: the x-axis and the y-axis. The x-axis is the horizontal line that represents the values of the x-coordinate, while the y-axis is the vertical line that represents the values of the y-coordinate.
The equation y = 0 represents a straight line where the y-coordinate is always zero, regardless of the value of x. Visually, this line lies exactly on the x-axis, intersecting it at the origin, which is the point (0, 0). Since the x-coordinate remains variable while the y-coordinate is fixed at zero, this line is commonly referred to as the x-axis.
So, in summary, the line y = 0 is synonymous with the x-axis.