Exercise 6 Page 371

In an ordered pair, the x-coordinate comes first and the y-coordinate comes second.

Location: x-axis
Graph:

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. To graph ( -5,0), we first find -5 on the x-axis and make a mental note of this grid line. The x-coordinate -5 tells us to move 5 units to the left from origin — the negative horizontal direction.

Next, we find 0 on the y-axis and follow this grid line until it collides with the grid line from our x-coordinate. The y-coordinate 0 tells us that the point lies on the x-axis.

The point ( -5, 0) lies on the point at which these two grid lines intersect. Now we want to describe the location of this point. Recall what we know about the quadrants of a coordinate plane. The coordinate plane is divided into four quadrants by the x- and y-axes.

The y-coordinate of the point (-5,0) is 0. The part of the coordinate plane where one of the coordinates is 0 is the axes. The axis where the y- coordinate is 0 is the x-axis. Therefore, the point is located on the x-axis.

Subchapter links

Try It p.370-372

Self-Assessment for Concepts & Skills p.372

Self-Assessment for Problem Solving p.373

Review & Refresh p.374

Concepts, Skills, & Problem Solving p.374-376

Exercise 6 Page 371

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