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do you know the equation for a circle centered at origin?
or just the general form
Do you know the general form?
oh and that should be = r^2 not plus r^2
thats what i meant
(x-h)^2 + (y-k)^2 = r^2 is the general form
(h,k) is the origin so you need to figure out what the origin is
Do you know what it is?
how do i find it?
do you know the equation of the vertical and horizontal lines?
4 & 7??
the form for the equation of a vertical line is x=c (c is a constant) horizontal is is y=c
so the vertical line is x=4
and the horizontal line is y=4
so your origin is (4,4)
now you need to find the radius and plug into the equation for a circle
is the radius 5?
no. How did you get 5?
i dont understand how to get it
the radius is the distance from the origin to an endpoint on the circle
how did you get 9?
subtract the y coordinate of the origin from the y coordinate of the endpoint connected by the vertical line
that would be subtracting the x coordinate from the y coordinate.
try drawing the circle on graph paper with origin (4,4) and it should become clear