Question

You start at (2, -1). You move left 4 units. Where do you end?

Answer 1

(-2, -1)

Explanation:

You want the point that is 4 units left of (2, -1).

X-coordinate

The x-coordinate of an (x, y) coordinate pair tells you the number of units to the right of the x=0 point. It increases for points farther right, and decreases for points farther left.

Moving left 4 units decreases the x-coordinate by 4 units. The x-coordinate of 2 becomes ...

2 -4 = -2

The coordinates of the moved point are (-2, -1).

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