Answer
(a) $(-4,9)$
(b) $(-4,-9)$
Work Step by Step
(a)
In an even function, for every point $(x,y)$ there also exists point $(-x,y)$
Since we know $(4,9)$ exists, $(-4,9)$ also has to exist.
(b)
In an odd function, for every point $(x,y)$ there also exists point $(-x,-y)$
Since we know $(4,9)$ exists, $(-4,-9)$ also has to exist.
