#### Answer

(a) the first quadrant.
(b) the second quadrant.
(c) the fourth quadrant.
(d) the third quadrant.

#### Work Step by Step

(a) Since both $ x=1\gt 0$ and $ y=2\gt 0$, then $(1,2)$ is in the first quadrant.
(b) Since $ x=-3\lt 0$ and $ y=2\gt0$, then $(-3, 2)$ is in the second quadrant.
(c) Since $ x=4\gt 0$ and $ y=-3\lt0$, then $(4,-3)$ is in the fourth quadrant.
(d) Since $ x=-4\lt 0$ and $ y=-1\lt0$, then $(-4,-1)$ is in the third quadrant.