The answer is D. Here's why:
A. That is false because both the x-axis and the y-axis have both positive and negative values on them.
B. That is false because in a graph, numbers, and numbers only, are placed along both the x-axis and the y-axis.
C. That is false because the x-axis and the y-axis are always very similar, if not exactly the same length in every direction.
That leaves only D as the answer. That is correct because the x-axis runs horizontal (from right to left on your paper and the y-axis runs vertically (up and down on your paper)
Hope that helps!
