y = 2, 4, 6, 8
yes
y = 8 - 2*x
determine whether each relation is a function y equals -8
y = x This is a line and a function. Function values are y values.
no
y=m(x)+b
If you plug in y for the x function, and it equals the answer you got, it is right.
y - |x| is an expression, not a function.
Y=X^2 is a function for it forms a parabola on a graph.
Yes, it is.
Yes.