Answers are
P= - 5/2
Q = - 5/2
R= 5/2
M= 2/5
Step by step
Slope can be found using the formula
y2 - y1 over x2 - x1
P = (-4,8) and (4, -12)
-12 -8 over 4 - -4
-20/8
= -5/2
Q= (6.8, 13) and (12, 0)
0 - 13 over 12 - 6.8
-13/5.2
= - 5/2
R= ( .4, -3) and (6.8, 13)
13 - -3 over 6.8 - .4
16/6.4
= 5/2
M= (-15.5, 0) and (0, 6.2)
6.2 - 0 over 0 - -15.5
6.2 / 15.5
= 2/5