In an ordered pair, the x-coordinate comes first and the y-coordinate comes second.
Practice makes perfect
In an ( x, y) ordered pair, the first number tells us the x-coordinate of the point and the second number tells us the y-coordinate of the point. We want to graph D( 2, 1), so we first find 2 on the x-axis and make a mental note of this grid line. The x-coordinate 2 tells us to move 2 units to the right of the origin — the positive horizontal direction.
Next, we find 1 on the y-axis and follow this grid line until it collides with the grid line from our x-coordinate. The y-coordinate 1 tells us to move 1 units up from the origin — the positive vertical direction.
The point D( 2, 1) lies on the point at which these two grid lines intersect.
