Expression 9: "r" squared equals left parenthesis, "x" minus 6 , right parenthesis squared plus left parenthesis, "y" minus 5 , right parenthesis squaredr2=x−62+y−52
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Expression 10: "y" equals 5 left brace, 7.4 less than or equal to "x" less than or equal to 13 , right bracey=57.4≤x≤13
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Expression 11: "x" equals 13 left brace, 1 less than or equal to "y" less than or equal to 5 , right bracex=131≤y≤5
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Expression 12: "y" equals 5 left parenthesis, "x" minus 7 , right parenthesis left brace, 1 less than or equal to "y" less than or equal to 9 , right bracey=5x−71≤y≤9
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Expression 13: "y" equals 2.5 left parenthesis, "x" minus 11 , right parenthesis left brace, 5 less than or equal to "y" less than or equal to 8 , right bracey=2.5x−115≤y≤8
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Expression 14: "r" squared equals left parenthesis, "x" minus 18 , right parenthesis squared plus left parenthesis, "y" minus 1.5 , right parenthesis squaredr2=x−182+y−1.52
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Expression 15: "x" equals 18 left brace, 2.9 less than or equal to "y" less than or equal to 9 , right bracex=182.9≤y≤9
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Expression 16: "y" equals left parenthesis, "x" minus 18 , right parenthesis cubed plus 3.5 left brace, negative 1 less than or equal to "y" less than or equal to 7 , right bracey=x−183+3.5−1≤y≤7
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Expression 17: "y" equals 9 left brace, 15 less than or equal to "x" less than or equal to 21 , right bracey=915≤x≤21