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Mathematics 21 Online
OpenStudy (anonymous):

5. y=x^2+1

OpenStudy (anonymous):

@Directrix

OpenStudy (alexandervonhumboldt2):

so it is the standart parabola sifted 1 unit up

OpenStudy (alexandervonhumboldt2):

it opens up

OpenStudy (anonymous):

you need to find the graph of each function rule & what ?

Directrix (directrix):

As we did the other one, there will be two things to check.

OpenStudy (anonymous):

what two points does it need to go through .. ?

Directrix (directrix):

y=x^2+1 --------- The graph passes throug ( 0, 1). In fact, that is the vertex. The second thing to look for is a parabola that is opening upwards.

OpenStudy (anonymous):

So its not b or d

Directrix (directrix):

Look at option A. Does it pass through the point (0,1) and does it open upward.

Directrix (directrix):

>>>So its not b or d Correct

OpenStudy (anonymous):

Yes

OpenStudy (anonymous):

It passes through those points and it is upwards

Directrix (directrix):

Option A does not pass through the point (0,1). Option A passes through ( 0, -1)

OpenStudy (anonymous):

Oh.. then its c ?

Directrix (directrix):

Yes, that option meets the two test. Correct

OpenStudy (anonymous):

Thank you.

Directrix (directrix):

You are welcome.

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