Respuesta :
When the x = 0 in any point, that point lies on the y-axis not on the x-axis. Janine's argument or statement is very wrong. Janine's error probably since she talked about the x-coordinate, then it automatically lies on the x-axis. Or probably, she didn't study her lessons.
The correct answer is:
The x-coordinate of an ordered pair tells us how many units to go left or right from the origin. If the x-coordinate is positive, we go right; if it is negative, we go left.
The y-coordinate of an ordered pair tells us how many units to go up or down from the origin. If the y-coordinate is positive, we go up; if it is negative, we go down.
If we are on the x-axis, this means we have not gone up or down any from the origin. This means the y-value did not change, and the y-coordinate is 0.
Take the point (0, 3). To plot this point, we do not go over from the origin, but we go up 3. This point is not on the x-axis.
However, consider the point (3, 0). To plot this point, we go over 3 from the origin, but do not go up or down any. This point is on the x-axis.
Any point on the x-axis has a y-coordinate of 0.