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Mathematics 8 Online
OpenStudy (anonymous):

help pleaseeee

OpenStudy (anonymous):

OpenStudy (sumi29):

Alright so do you know how to plot such equations, or this is your first attempt?

OpenStudy (anonymous):

ok first of all do you know what \[\frac{y^2}{b^2}-\frac{x^2}{a^2}=1\] looks like ?

OpenStudy (anonymous):

yes

OpenStudy (sumi29):

Ok so since you are aware of the equation, do you know what does it mean when you equate the LHS to 1 in the standard equation? I mean, do you know what would happen if instead of being equal to 1 the LHS would be greater than or less than 1?

OpenStudy (anonymous):

in this case general form is \[\frac{y^2}{b^2}-\frac{x^2}{a^2}=1\] so \(b=9,a=7\)

OpenStudy (anonymous):

so you just plug them in

OpenStudy (anonymous):

asymptotes are \(y=\pm\frac{b}{a}x\)

OpenStudy (anonymous):

for your example you get \[y=-\frac{9}{7}x\] and \[y=\frac{9}{7}x\]

OpenStudy (anonymous):

since the center is at the origini \((0,0)\) the vertices are 9 units above and below the center i.e. at \((0,9)\) and \((0,-9)\)

OpenStudy (anonymous):

i guess you need to know that since the \(y\) term comes first, it looks like htis |dw:1375456539552:dw|

OpenStudy (anonymous):

this is the example right

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

now you don't have \[\frac{y^2}{9^2}-\frac{x^2}{7^2}=1\] you have \[\huge\frac{y^2}{9^2}-\frac{x^2}{7^2}>1\]

OpenStudy (anonymous):

greater than, not "equal to" so you have to decide what part to shade, which is frankly not that hard

OpenStudy (anonymous):

|dw:1375456750039:dw|

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