Is this graph an element?
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I know this is, but I'm not sure about the graph I posted above. https://gyazo.com/a34cdd8ec6f6b49f7e82aa5494c9f6e9
looks like a function to me
it's not a function because it fails the vertical line test
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it's possible to pass a vertical line through more than one point
which is why it fails the vertical line test
Is it a relation?
A relation is a set of ordered pairs.
The parabola you posted is a function.
But the vertical line test?
as Mertsj said, `A relation is a set of ordered pairs.`
so basically, a relation is anything with a bunch of points on an xy grid. In the case of the circle, it's a bunch of points plotted to form a circle. So yes @sloppycanada the circle graph is a relation
Does that make this https://gyazo.com/a34cdd8ec6f6b49f7e82aa5494c9f6e9
also a function?
that's a function because it is impossible to pass a vertical line through more than one point on the parabola
So it passes the vertical line test