Question

Where are all points whose second coordinate is negative?1. In second or third quadrant2. In first or fourth quadrant3. In third or fourth quadrant4. In first or second quadrant

Answer 1

Solution:

Points are located on a cartesian plane using coordinates.

The coordinates are the x-coordinate and the y-coordinate

A cartesian plane is shown below with the quadrants.

A cartesian plane has four quadrants (I, II, III, and IV).

For points whose second coordinate is negative, this implies points whose y-coordinate are negative.

When a point has a y-coordinate as negative, it will lie on the negative y-axis plane.

To have a second coordinate as negative, the two possibilities are given below;

$\begin{gathered} (+x,-y) \\ or \\ (-x,-y) \\ \\ \text{This means the point having a negative y-coordinate.} \\ (+,-),(-,-) \end{gathered}$

To plot points having these coordinates, the points will lie in the quadrants as shown below;

Therefore, all points whose second coordinate is negative will lie in the third or fourth quadrant.

Therefore, OPTION 3 is the correct answer.