Question

without graphing, determine whether the following two points would be on a vertical line or a horizontal line.

(3, 4), (3, 8)

Answer 1

what would be a good defining characteristic of horiz, and verts?

Answer 2

If it were horizontal, the y values would likely be the same.

Answer 3

the x-coordinate is fixed for both points, meaning that it does not change. This can only mean that the two points vary in the y-coordinate only, and since y is the vertical axis, the two points must lie on a vertical line.