Question

What is a quadratic function and how do you graph it? Thanks :)

Answer 1

I think it is a parabola which has its center on an axis but I'm not sure... please help :)

Answer 2

you know what a quadratic equation is right?

Answer 3

The quadratic formula or a quadratic equation

Answer 4

a quadratic equation:
x^2 + 6x + 9 = 0

Answer 5

you know what a function is correct? like
f(x) = x + 1

Answer 6

OH OH OH OH OH OH OH OH I have done that stuff before! that one was (x-3)^2!

Answer 7

yes I know what a function is

Answer 8

Okay, good.
Let's use the quadratic function:
f(x) = x^2

Answer 9

f(x) = y
you input values of x to get your value of y.
from there you graph it as a parabola.

Answer 10

That's the quadratic function? I thought it was like something plus or minus the square root of something all over 2a?

Answer 11

this is how f(x) = x^2 would look like (not accurate)

Answer 12

what you are talking about is the quadratic formula.
\[\huge x = \frac{ -b \pm \sqrt { b^2 - 4ac} }{ 2a }\]

Answer 13

I know parabolas, I think I just didn't know the terms, but I know how to graph parabolas. Like, that first one you showed me, x^2+6x+9 that would graph a parabola with a zero on the point (3,3)

Answer 14

x^2 + 6x + 9 = f(x)
is simply
(x+3)^2 = f(x)
plug in x values to get your y values and plot the resulting points

Answer 15

wait it would be (-3,-3) then...

Answer 16

f(x) = (x+3)^2