Question

Why is the fourth quadrant positive,negative?

Answer 1

In the fourth quadrant the value of `x` is always positive and the value of `y` is always negative;
so coordinates `(x,y)` in quadrant 4 are always `("positive", "negative")`

Explanation:

Using standard notation:

All points to the right of the Y-axis have values for `x` which are positive.

All points below the X-axis have values of `y` which are negative.

Quadrant 4 is the area to the right of the Y-axis and below the X-axis.

Therefore all points in quadrant 4 have values of `x` which are positive and values of `y` that are negative.