0
Anonymous
f(x)= -x-9
Wiki User
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f(x) = 2x2 + 4x - 7
2x2-y2
no
'Y' is a function 'f' of 'x': Y = f(x) . 'Z' is a function 'g' of 'y': Z = g [ f(x) ] .
Y=X^2 is a function for it forms a parabola on a graph.