Expression 2: "f" Subscript, 0 , Baseline left parenthesis, "x" , right parenthesis equals StartRoot, 0.8 0 4 5 squared minus left parenthesis, "x" minus 21.2 9 7 , right parenthesis squared , EndRoot left brace, 21.2 9 7 less than or equal to "x" , right brace Has graph. To audio trace, press ALT+T.f0x=0.80452−x−21.297221.297≤x
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Expression 3: "f" Subscript, 1 , Baseline left parenthesis, "x" , right parenthesis equals 0.0 1 2 6 8 9 4 3 "x" to the 4th power minus 1.0 3 2 7 3 2 7 1 "x" cubed plus 31.4 5 0 3 4 4 9 9 "x" squared minus 424.9 6 9 2 4 7 8 7 "x" plus 2151.9 3 0 9 4 2 6 9 left brace, "x" less than 21.2 9 7 , right bracef1x=0.01268943x4−1.03273271x3+31.45034499x2−424.96924787x+2151.93094269x<21.297