Answer:
y={-5,-4,-5/2,-13/3}
Explanation:
a.f(-2)=y=1/2(x)-4
substitute -2for x
y=1/2(-2)-4
y=-1-4
y=-5
b.f(0)
y=1/2(0)-4
y=0-4
y=-4
c.f(3/2)
y=1/2(3/2)-4
3/2-4
find the L.C.M=2
3/2-4/1
3-8/2
-5/2
d.f(-2/3)
y=1/2(-2/3)-4
-2/6-4
2 into itself 1 ,2 into 6 ,3
-1/3-4
find the least common multiple equal to 3
-1/3-4/1
-1-12/3
y=-13/3