表达式6: "y" plus 2 equals StartFraction, left parenthesis, negative 2 , right parenthesis Over left parenthesis, negative 3 , right parenthesis , EndFraction left parenthesis, "x" plus 3 , right parenthesis left brace, negative 3 less than or equal to "x" less than or equal to 0 , right bracey+2=−2−3x+3−3≤x≤0
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表达式7: distance left parenthesis, "C" , "A" , right parenthesisdistanceC,A
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表达式8: "N" equals left parenthesis, negative 3.5 , negative 3 , right parenthesisN=−3.5,−3
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表达式9: distance left parenthesis, "N" , "C" , right parenthesisdistanceN,C
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表达式10: "y" plus 0.1 equals StartFraction, left parenthesis, negative 0.1 , right parenthesis Over left parenthesis, negative 0.1 7 , right parenthesis , EndFraction left parenthesis, "x" plus 0.1 7 , right parenthesis left brace, negative 0.1 7 less than or equal to "x" less than or equal to 0 , right bracey+0.1=−0.1−0.17x+0.17−0.17≤x≤0
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表达式11: "B" equals left parenthesis, negative 0.1 7 , negative 0.1 , right parenthesisB=−0.17,−0.1
