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Question Number 187605 by otchereabdullai last updated on 19/Feb/23

w h a t i s t h e n a m e o f t h e s h a p e w h o s e

g r a p h i s :

(a) f (x, y) = \sqrt{x^{2} + y^{2}}

(b) f (x, y) = x^{2} + y^{2}

(c) f (x, y) = \sqrt{1 - x^{2} - y^{2}}

(d) f (x, y) = x^{2} + y^{2} - 2 x

(e) f (x, y) = x y