Final answer:
The length of the line segment PR is 4 units and it is found in the fourth quadrant.
Step-by-step explanation:
The length of the line segment PR can be found using the distance formula. The formula for finding the distance between two points (x1, y1) and (x2, y2) in a coordinate plane is given by:
d = √((x2 - x1)^2 + (y2 - y1)^2)
Plugging in the values for P = (-4, 1) and R = (-4, -3), we have:
d = √((-4 - -4)^2 + (-3 - 1)^2) = √(0^2 + (-4)^2) = √(0 + 16) = √16 = 4 units
Since both x-coordinates of the points are the same (-4), the line segment PR is vertical and lies in the fourth quadrant.