Make the given changes in the indicated examples of this section, and then solve the resulting problems.

In Example 3(b), change y < 0 to y > 0 and then find the location of the points (x, y).

Data from Example 3(b) 

Where are all points (x, y) for which x < 0 and y < 0? Noting that x < 0 means “x is less than zero,” or “x is negative,” and that y < 0 means the same for y, we want to determine where both x and y are negative. Our answer is “in the third quadrant,” because both coordinates are negative for all points in the third quadrant, and this is the only quadrant for which this is true. See Fig. 3.12.

Transcribed Image Text:

x<0 x<0 y <0 y 0 y <0 Fig. 3.12 -X