Exercise 5 Page 208

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 C( - 1, 2), we first find - 1 on the x-axis and make a mental note of this grid line. The x-coordinate -1 tells us to move 1 unit to the left of the origin — the negative horizontal direction.

Next, we find 2 on the y-axis and follow this grid line until it collides with the grid line from our x-coordinate. The y-coordinate 2 tells us to move 2 units up from the origin — the positive vertical direction.

The point C( - 1, 2) lies on the point at which these two grid lines intersect.