式13: "y" equals "x" plus 1.5 left brace, negative 8 less than or equal to "x" less than or equal to negative 5 , right bracey=x+1.5−8≤x≤−5
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式14: "y" equals negative 2 "x" minus 22.5 left brace, negative 8 less than or equal to "x" less than or equal to negative 5 , right bracey=−2x−22.5−8≤x≤−5
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式15: "y" equals negative "x" plus 5 left brace, 6 less than or equal to "x" less than or equal to 12 , right bracey=−x+56≤x≤12
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式16: "y" equals 2 "x" minus 31 left brace, 8 less than or equal to "x" less than or equal to 12 , right bracey=2x−318≤x≤12
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式17: "y" equals negative "x" plus 1.5 left brace, 5 less than or equal to "x" less than or equal to 8 , right bracey=−x+1.55≤x≤8
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式18: "y" equals 2 "x" minus 22.5 left brace, 5 less than or equal to "x" less than or equal to 8 , right bracey=2x−22.55≤x≤8
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式19: "y" equals negative 2 thirds left parenthesis, "x" plus 3.5 , right parenthesis squared plus 3 left brace, negative 5 less than or equal to "x" less than or equal to negative 2 , right bracey=−23x+3.52+3−5≤x≤−2
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式20: "y" equals 2 thirds left parenthesis, "x" plus 3.5 , right parenthesis squared plus 3 left brace, negative 5 less than or equal to "x" less than or equal to negative 2 , right bracey=23x+3.52+3−5≤x≤−2
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式21: "x" equals negative 1 left brace, negative 3 less than or equal to "y" less than or equal to 3 , right bracex=−1−3≤y≤3
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式22: "y" equals 0 left brace, negative 1 less than or equal to "x" less than or equal to 1 , right bracey=0−1≤x≤1
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式23: "x" equals 1 left brace, negative 3 less than or equal to "y" less than or equal to 3 , right bracex=1−3≤y≤3
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式24: "y" to the negative 1st power equals 1.6 left parenthesis, "x" minus 1.5 , right parenthesis squared plus 1.5 left brace, 1.5 less than or equal to "x" less than or equal to 4 , right bracey−1=1.6x−1.52+1.51.5≤x≤4
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式25: "y" to the negative 1st power equals negative 1.6 left parenthesis, "x" minus 4.5 , right parenthesis squared minus 1.5 left brace, 1.5 less than or equal to "x" less than or equal to 4.5 , right bracey−1=−1.6x−4.52−1.51.5≤x≤4.5