Exercise 99 Page 48

In an ( x, y) ordered pair, the first number shows the x-coordinate and the second number shows the y-coordinate. To graph ( - 4, -8), we first find -4 on the x-axis and make a mental note of this grid line. The x-coordinate -4 tells us to move four units in the negative horizontal direction.

Next, we find -8 on the y-axis and follow this grid line until it collides with the grid line from our x-coordinate. The y-coordinate -8 tells us to move eight units in the negative vertical direction.

The point ( - 4, -8) lies on the point at which these two grid lines intersect.