To graph in the cartesian plane
would that be a graph where the x,y co-ordinates are (0,0) and the radius of the circle on the graph is 3 ???
(btw, while I know the only example I have is an equation where , therefore (x,y) co-ords are (10,0) and radius is 4. From this I deduce the results from the equation above (a))
b ---> has co-ords (x,y) = (0,0), which is a diagonal line through the intersection of x and y, from top right to bottom left, shaded area on upper side marking x<=y???
am i on the right track?