Answer:
coordinates of vertex M is (x, y) = (2, -2)
Step-by-step explanation:
Since JKLM is a parallelogram, this implies that JK parallel to LM and KL parallel to JM. This means that
Slope of JK = slope of LM

And
Slope of KL = slope of JM

From equation (i) and (ii) we get




Put the value of x in equation (ii) we get

So, the coordinates of vertex M is (x, y) = (2, -2).