Question

Which of the following points is located in the third quadrant of the coordinate plane?

A. (-1, -9)
B. (1, -9)
C. (-1, 9)
D. (1, 9)

Answer 1

The point located in the third quadrant of the coordinate plane is A. (-1, -9), as both the x and y coordinates are negative, which is the defining property of the third quadrant.

Step-by-step explanation:

The point located in the third quadrant of the coordinate plane is A. (-1, -9). To determine this, one must first understand the properties of the coordinate plane quadrants:

• First Quadrant: Both x and y are positive.
• Second Quadrant: x is negative, y is positive.
• Third Quadrant: Both x and y are negative.
• Fourth Quadrant: x is positive, y is negative.

The third quadrant is where both the x (horizontal) and y (vertical) coordinates are negative. Looking at the options provided:

• A. (-1, -9): Both coordinates are negative.
• B. (1, -9): x is positive, y is negative.
• C. (-1, 9): x is negative, y is positive.
• D. (1, 9): Both coordinates are positive.

Only option A has both coordinates in the negative, which places it in the third quadrant.