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I am not taking a maths course.
Zeta, if you don't mind me questioning, what course are you taking?
Yes. Another thing that must be satisfied by a function is that it must have a value at every element of its domain.
In those terms, yes.
Oh I see, so the distinction is that it can be many to one, but not one to many.
y=x^2. At every value of x has only one value of y, but -1 and 1 yield the same value of y.
(0,1), (1,0), (2,0), (3,2)
I know that y^2 = 4ax is the general form of a parabola, I was just asking why it was not a function...
Well, you would consider it as a function. For example:
y^2=4ax is not a function.
Yes, it is a parabola, but I'm not understanding why that would be a function (you can have two values for y given a value for x), but x^y = y^x is not a function, even though there are two values for y you can have given an x-value.
Is it not the form for a parabola?
y^2 = 4ax would be a parabola.