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Mathematics 9 Online
OpenStudy (anonymous):

What is the equation of the graph?

OpenStudy (anonymous):

OpenStudy (anonymous):

can someone help ?

OpenStudy (anonymous):

The equation of a circunference is : (x-a)^2+(y-b)^2=r^2 where : (a,b) are the coordinates of the center of the circunference and r is the radius you can find a,b and r in the graphic

OpenStudy (anonymous):

is it (x-1)^2+(y-4)^2=r^2 ?

OpenStudy (anonymous):

the coordinate of center is : (-1,4) no (4,1), and for radius you can check any distance from center to any point of the circunference

OpenStudy (anonymous):

so its (x – 4)2 + (y + 1)2 ?

OpenStudy (anonymous):

and radius 7 ?

OpenStudy (anonymous):

first is right but for radius , can you check how many squares there are between the center and the top (or bottom) of the circumference?

OpenStudy (anonymous):

i got 7

OpenStudy (anonymous):

now 9

OpenStudy (anonymous):

9 squares between the center and the top of circumference?

OpenStudy (anonymous):

the center is the blue point

OpenStudy (anonymous):

ohhh the squares from the center to the bottom ? 2

OpenStudy (anonymous):

i see 2 and half

OpenStudy (anonymous):

so thats the radius ?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

but that isnt a option.

OpenStudy (anonymous):

:o what is your final answer you got?

OpenStudy (anonymous):

(x – 4)2 + (y + 1)2 = but idk the radius

OpenStudy (anonymous):

2,5

OpenStudy (anonymous):

idk , ill ask someone. @satellite73 . do you know how to do this ?

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