How can you tell if a graph is If f(x) = -f(-x), then the graph is symmetric about the symmetric about the origin? origin. If f (-x) = f(x), then the graph is symmetric about the origin. O Iff'(0) = f(0), then the graph is symmetric about the origin. O Iff(y) = f(x), then the graph is symmetric about the origin. On which of the following intervals is the graph of x2 - 1 0 ( - 2 20) f (I) = 2 + 1 concave up? ( - 0 , - 2 ) O f (x) is concave up for all r. Of (x) is never concave up. Find the interval(s) where the function O x> 2 orx