(Section 1.8: x=fy()) 1.8.3 • The graphof x=y2below is a parabola opening to the right. WARNING 2:The graph never goes to the left of the y-axis, because squaresof real numbers are never negative. • Look at the table.fis even, so each pair of opposite yvaluesyields a common function value, or x. Graphically, this means that every point x,yon the graph has a “mirror image partner” x,±ythat is also on the graph, and the graph is symmetric about the x-axis (WARNING 3). A function fis even±f²y=,³y´Domf±The graph of x=is symmetric about thex-axis.•fis decreasingon the
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