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Mathematics 21 Online
OpenStudy (anonymous):

.

OpenStudy (anonymous):

An ellipse look for equation of ellipse online :P

OpenStudy (anonymous):

\[(x -x1) ^{2} \div a ^{2} + (y-y1)^{2} \div b ^{2} = 1\] its basic form of equation of ellipse with origin shifted from origin to (x1,y1) and major axis = 2a minor axis = 2b I think this will definately get u to the solution

OpenStudy (anonymous):

find the center of your graph... the equation of your ellipse is in this form: \(\large \frac{(x-h)^2}{a^2}+\frac{(y-k)^2}{b^2}=1 \) where (h, k) is the center and "a" and "b" is exactly what @mayank_mak says....

OpenStudy (anonymous):

@coolaidd From the graph, count and you'll find: (h, k) = ( 2, 2 ) 2a = 6 , 2b = 4 Plug these numbers into the standard ellipse form as provided above: ..

OpenStudy (anonymous):

these are the choices

OpenStudy (mathteacher1729):

You have an ellipse here. (think of it as a flattened circle). Google "Equation of ellipse" and then fill in the formula with the given center, major and minor axis. :)

OpenStudy (anonymous):

c?

OpenStudy (anonymous):

hello?

OpenStudy (mathteacher1729):

Are you allowed to use a graphing calculator to graph these?

OpenStudy (mathteacher1729):

To really get a feel for what these different equations represent, it's usually good to graph a bunch and see how the equation changes the shape of the ellipse. :)

OpenStudy (anonymous):

I dont have one..

OpenStudy (anonymous):

is it c?

OpenStudy (mathteacher1729):

You can use geogebra, it doesn't even require an installation. :) or type the equations into http://www.wolframalpha.com and no, it's not c. If it's centered at (2,2) then you're going to have (x MINUS 2) and (y MINUS 2)

OpenStudy (anonymous):

a?

OpenStudy (mathteacher1729):

Hold on, I'm plotting them with geogebra...

OpenStudy (mathteacher1729):

If you'd like to know how to use geogebra to graph stuff like this, just let me know, I'd be glad to show you. It's SUPER useful for all sorts of graphing problems.

OpenStudy (anonymous):

D

OpenStudy (anonymous):

@coolaidd u can try B also.

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