式6: left parenthesis, "x" minus 4 , right parenthesis squared plus left parenthesis, "y" minus 4 , right parenthesis squared equals 64x−42+y−42=64
6
式7: "y" equals "x" minus 2 left brace, 10.6 less than or equal to "x" less than or equal to 13 , right bracey=x−210.6≤x≤13
7
式8: "x" equals 4 left brace, 12 less than or equal to "y" less than or equal to 15 , right bracex=412≤y≤15
8
式9: "y" equals negative "x" plus 6 left brace, 8.6 less than or equal to "y" less than or equal to 11.5 , right bracey=−x+68.6≤y≤11.5
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式10: "y" equals 2.3 "x" left brace, 7.1 less than or equal to "x" less than or equal to 8.5 , right brace minus 5y=2.3x7.1≤x≤8.5−5
10
式11: left parenthesis, "x" minus 7 , right parenthesis squared plus left parenthesis, "y" minus 7 , right parenthesis squared less than or equal to .5x−72+y−72≤.5