式12: "y" equals .0 2 7 "x" squared plus 13 left brace, negative 11 less than or equal to "x" less than 11 , right bracey=.027x2+13−11≤x<11
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式13: .0 2 7 "x" squared plus 13 less than or equal to "y" less than StartFraction, 1 Over 100 , EndFraction "x" squared positive 15.027x2+13≤y<1100x2+15
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式14: "y" equals negative "x" minus 13 left brace, negative 23 less than or equal to "x" less than or equal to negative 13 , right bracey=−x−13−23≤x≤−13
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式15: "y" equals negative "x" minus 11 left brace, negative 21.5 less than or equal to "x" less than or equal to negative 12 , right bracey=−x−11−21.5≤x≤−12
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式16: "y" equals negative "x" minus 9 left brace, negative 20.3 less than or equal to "x" less than or equal to negative 10.7 , right bracey=−x−9−20.3≤x≤−10.7
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式17: "y" equals "x" minus 13 left brace, 13 less than or equal to "x" less than or equal to 23 , right bracey=x−1313≤x≤23
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式18: "y" equals "x" minus 11 left brace, 12 less than or equal to "x" less than or equal to 21.5 , right bracey=x−1112≤x≤21.5
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式19: "y" equals "x" minus 9 left brace, 10.7 less than or equal to "x" less than or equal to 20.3 , right bracey=x−910.7≤x≤20.3
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式20: "y" equals negative 16 left brace, negative 10 less than or equal to "x" less than or equal to 10 , right bracey=−16−10≤x≤10
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式21: "y" equals negative 15 left brace, negative 10 less than or equal to "x" less than or equal to 10 , right bracey=−15−10≤x≤10
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式22: negative 17 less than or equal to "y" less than or equal to negative 16 left brace, negative 10 less than "x" less than 10 , right brace−17≤y≤−16−10<x<10
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式23: "y" equals negative 14 left brace, negative 10 less than or equal to "x" less than or equal to 10 , right bracey=−14−10≤x≤10
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式24: negative 15 less than or equal to "y" less than negative 14 left brace, negative 10 less than or equal to "x" less than or equal to 10 , right brace−15≤y<−14−10≤x≤10