Which of these functions represents a quadratic function and why?
Stacey Warren - Expert brainly.com
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its an interesting question... as they aren't all functions...
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so do you know the general form for a quadratic..?
well the general form is
\[y = ax^2 + bx + c\]
I think that the last one is the quadratic function because reading it from right to left it goes downwards in value of x until it gets to the constant
so which equations fit this form...?
so that's good... but what about the 2nd one...?
Well I thin that it doesnt work because it starts with x= and y cannot be used as a quadratic equation?
the answer is y=3x^2-5x+9
Thanks I got it right and I understand:)
well it can start with anything you like and contain and variable you like...
by the problem is the 2nd one is not a function...
if you graphed it you would see something like this...
which fails the vertical line test for a function... I'd expect you know about that