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Mathematics 13 Online
OpenStudy (anonymous):

HELP with axis of symmetry? Choose the equation below whose axis of symmetry is x = 0. Choose one answer. a. y = x2 + 2x b. y = x2 − 16x + 58 c. y = x2 + 2 d. y = x2 − 4x + 2

OpenStudy (anonymous):

a

OpenStudy (anonymous):

I was thinking that it's B and I is the objective pronoun. Right ?

OpenStudy (anonymous):

it is not A beware of answers with no explanation

OpenStudy (anonymous):

My reply dissapered

OpenStudy (anonymous):

nvm I'm out.

OpenStudy (johnweldon1993):

Well first...x = 0 is just a vertical line at x = 0 correct? So this means at that line (which happens to be the y-axis) there is a graph where the left side looks like a mirror image of the right side

OpenStudy (johnweldon1993):

So where would that happen? Each of your choices have x^2 (which is a parabola) But which of your choices has that parabola with the vertex somewhere on the y-axis?

OpenStudy (anonymous):

its A because x2 and 2x are identical terms

OpenStudy (johnweldon1993):

That is incorrect \[\large x^2 \cancel{=} 2x\]

OpenStudy (johnweldon1993):

And graphically that equation would look like |dw:1396875768757:dw|

OpenStudy (anonymous):

well in that case it would be C

OpenStudy (anonymous):

it would be c rigt? it intercepts at (0,2)

OpenStudy (johnweldon1993):

If the line x = 0 is |dw:1396875817603:dw|

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