Question

Which of the following are quadratic functions?

Check all that apply.

A. y=2(x-3x^2+1)
B. y=5+2x
C. y=1/2x^2-13x+4
D. y=x/x-1

Answer 1

do you know what a quadratic function is?

Answer 2

is this a quadratic y=ax^2+bx+c?
and can a be zero?

Answer 3

no sir

Answer 4

i know a cant be zero and that it has to be in the form y=ax^2+bx+c

Answer 5

so which of the above can you write in the form y=ax^2+bx+c

Answer 6

i think a and c is that correct?

Answer 7

good!

Answer 8

wooot! thanks

Answer 9

are you sure C is a quadratic equation? look at the definition

Answer 10

\[y=\frac{1}{2}x^2-13x+4\] is a quadratic

Answer 11

is this not the function they have?

Answer 12

oh. I thought the whole thing was on the denominator. but maybe not.

Answer 13

maybe that is what the person meant but thats not how i read it