<h2>
Answer:</h2>
PR = 5 units.
<h2>
Step-by-step explanation:</h2>
<em>Given:</em>
Right triangle
Hypotenuse = P(–3, 2), Q(1, –3)
R = located in the third quadrant.
<em>To calculate the length of PR,</em>
(i) First make a sketch of the points P and Q. The diagram is attached to this response.
(ii) As shown in the diagram, the point R is located in the third quadrant and its distance from P is from point -3 to 2 on the y-axis.
There are 5 points between -3 and 2. Therefore, the length PR = 5 units