Which function is a quadratic function?

A. y = 1/x
B. y=5x – 7
C. y = –x 2 + 2x **(I think that it is this one)
D. y =|x|

3 answers

C. is y= -x² + 2x
sorry...

C is correct

You can also use x^2 for x-squared

Thanks!

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