Question

Which of the following equations represents a quadratic function?
http://i.imgur.com/jsRyQ4u.png

Answer 1

quadratic functions have the form: f(x)=ax^2+bx+c

Answer 2

a quadratic functions means that the largest power of any term is 2.

so, which equation has a term that has a power of 2?

Answer 3

b?

Answer 4

Does that look like ax^2+bx+c?

Answer 5

b, c, and d all have the power of 2, so that handles the 'quadratic' part of the question, the next part is to have it in the form of a quadratic. which of b, c, and d have fthe from like Mertsj gave?

Answer 6

:SSS

Answer 7

What does :SSS mean?

Answer 8

so we know that b, c or d are going to be the answer. we can rule out c becuase it has y^2, not x^2. so is b or d in the form of
y=Ax^2 +Bx + C?

Answer 9

okay so it would be b? i'm confused

Answer 10

mmmm.... maybe I can help if i undertand why you are choosing B over C and D?

Answer 11

because it has power of 2?

Answer 12

So what's the answer? b?

Answer 13

it having a power of 2 means that the function is quadratic, BUUUT we need the solution to also be in the correct form. with all the terms on one side and Y on the other. and to have the terms ranked from largest power to least power. like this:

Y = x^2 + x + #

Answer 14

@wolf1728
I gotta log off, will you follow the rest of this for me ^_^

Answer 15

I'd say 'D'

Answer 16

Shantel, are you still here?
I don't think 'B' could be the answer because the second term is 5*sq root of (x) and I don't think a quadratic equation can have a term that is a half power.

Answer 17

so d?