Table b represents a function, the reason being that for each value of input, there is one and only one value of output.
The answer is x = -0.6 and y = -8.2.
Im gonna guess and say the right ones might be
A = AB or A'B'
B = CB or C'B'
D = CA or C'A'
Cus all equal the same side
H0P3 It H2LPS :)
or something