Algebra I in Simple English/Lines(Linear Functions)/Functions and Relations
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[edit] Lesson
y = x2
Is this a function?
versus, y2 = x
Is this a function?
The first equation is a function because x has only one y-value, whereas the second equation has many values.
In a function, each domain value or x-value should only have one y-value, otherwise it is not a function.
