Here you have the solution to this task.
-28-(-24)=-4
14-18=-4
28-32=-4
Any of these should work and there are plenty more that would work as well
option A :- (3a + 12 ) / a
If the lines with those given slopes go trough 2 points then
A) is correct if the points are (6, 0) and (0, 3)
B) is correct if the points are (0, 0) and (-6, 3)
C) is correct if the points are (-6, 0) and (0, 3)