(Section 1.3: Basic Graphs and Symmetry) 1.3.9 Look at the table. Each pair of opposite xvaluesyields opposite function values. That is, fx()and f±xare always opposites. • Graphically, this means that every point x,yon the graph has a “mirror image partner” ±x,±yon the other side of the origin. The two points are separated by a 180±rotation (a half revolution) about the origin. These “mirror image pairs” are symmetric about the origin.• We say thatfis an odd function. (Why?) A function fis odd
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