How do you find the domain and range of a circle?
1 Answer
Jul 13, 2018
#(x-a)^2+(y-b)^2=r^2
where the centre is (a,b) and the radius is r
The graph is a circle so all the points are enclosed in it
The domain is the values for x so you subtract the radius from the centre coordinate and you add the radius to it
The range is the values for y so you do the same to the y coordinate
If you use
The centre is (-2,4) radius is 5
Domain
and
[-7,3]
Range
and
[-1,9]
