表达式20: "y" minus 0.5 equals 1 quarter left parenthesis, "x" plus 5.5 8 , right parenthesis left brace, negative 7.5 8 less than or equal to "x" less than or equal to negative 5.6 4 , right bracey−0.5=14x+5.58−7.58≤x≤−5.64
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表达式21: "y" minus 0.2 2 equals negative 0.6 left parenthesis, "x" plus 8.7 , right parenthesis left brace, negative 8.7 less than or equal to "x" less than or equal to negative 6.4 , right bracey−0.22=−0.6x+8.7−8.7≤x≤−6.4
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表达式22: "y" equals negative 0.6 left parenthesis, "x" plus 7.5 8 , right parenthesis left brace, negative 7.5 8 less than or equal to "x" less than or equal to negative 6.4 , right bracey=−0.6x+7.58−7.58≤x≤−6.4
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表达式23: left parenthesis, "x" plus 6 , right parenthesis squared plus left parenthesis, "y" plus 1 , right parenthesis squared equals 0.3x+62+y+12=0.3
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表达式24: "y" equals negative 4 "x" plus 4 left brace, 2.4 less than or equal to "x" less than or equal to 3.5 , right bracey=−4x+42.4≤x≤3.5
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表达式25: "y" equals negative 3 "x" minus 2 left brace, 1.3 less than or equal to "x" less than or equal to 2.6 5 , right bracey=−3x−21.3≤x≤2.65
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表达式26: "y" equals 0.2 "x" squared minus 2.9 5 left brace, negative 3.5 less than or equal to "x" less than or equal to 3.5 , right bracey=0.2x2−2.95−3.5≤x≤3.5
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表达式27: "y" equals 0.0 9 8 "x" squared minus 1.7 left brace, negative 3.5 less than or equal to "x" less than or equal to 3.5 , right bracey=0.098x2−1.7−3.5≤x≤3.5
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表达式28: "x" equals negative 3.5 left brace, negative 12 less than or equal to "y" less than or equal to negative 10 , right bracex=−3.5−12≤y≤−10
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表达式29: "x" equals negative 2.6 5 9 left brace, negative 12 less than or equal to "y" less than or equal to negative 10 , right bracex=−2.659−12≤y≤−10
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表达式30: "x" equals 3.5 left brace, negative 12 less than or equal to "y" less than or equal to negative 10 , right bracex=3.5−12≤y≤−10
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表达式31: "x" equals 2.6 5 9 left brace, negative 12 less than or equal to "y" less than or equal to negative 10 , right bracex=2.659−12≤y≤−10
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表达式32: "x" equals negative 4.4 left brace, negative 13 less than or equal to "y" less than or equal to negative 12 , right bracex=−4.4−13≤y≤−12
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表达式33: "x" equals 4.4 left brace, negative 13 less than or equal to "y" less than or equal to negative 12 , right bracex=4.4−13≤y≤−12
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表达式34: "x" equals negative 2 left brace, negative 13 less than or equal to "y" less than or equal to negative 12 , right bracex=−2−13≤y≤−12
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表达式35: "x" equals 2 left brace, negative 13 less than or equal to "y" less than or equal to negative 12 , right bracex=2−13≤y≤−12
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表达式36: "y" equals negative 12 left brace, negative 4.4 less than or equal to "x" less than or equal to negative 2 , right bracey=−12−4.4≤x≤−2
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表达式37: "y" equals negative 12 left brace, 2 less than or equal to "x" less than or equal to 4.4 , right bracey=−122≤x≤4.4
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表达式38: "y" equals negative 13 left brace, negative 4.4 less than or equal to "x" less than or equal to negative 2 , right bracey=−13−4.4≤x≤−2
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表达式39: "y" equals negative 13 left brace, 2 less than or equal to "x" less than or equal to 4.4 , right bracey=−132≤x≤4.4
