No Child Left Behind (NCLB) Proficiency Practice Exam

Which axis on a two-dimensional graph runs up and down?

Y axis X axis Z axis Origin

Correct Answer:

Y axis

Explanation:

In a two-dimensional graph, the vertical line that runs up and down is the y-axis. The horizontal line left to right is the x-axis, and the z-axis is used for depth in three-dimensional graphs. The origin is simply where the axes cross, at the point (0,0). So the axis that goes up and down is the y-axis.

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