表达式7: "y" equals "x" minus 1 left brace, 6 less than or equal to "x" less than or equal to 11 , right bracey=x−16≤x≤11
7
表达式8: "x" equals 0 left brace, 8 less than "y" less than 13 , right bracex=08<y<13
8
表达式9: "y" equals negative "x" minus 1 left brace, negative 11 less than or equal to "x" less than or equal to negative 6 , right bracey=−x−1−11≤x≤−6
9
表达式10: "y" equals negative 4 left brace, negative 12 less than or equal to "x" less than or equal to negative 2 , right bracey=−4−12≤x≤−2
10
表达式11: "y" equals negative 4 left brace, 2 less than or equal to "x" less than or equal to 12 , right bracey=−42≤x≤12
11
表达式12: "y" equals negative 8 left brace, negative 4 less than or equal to "x" less than or equal to 4 , right bracey=−8−4≤x≤4
12
表达式13: left parenthesis, "x" minus 0 , right parenthesis squared plus left parenthesis, "y" minus 5 , right parenthesis squared equals 17 squared left brace, 0 less than or equal to "y" less than or equal to 22 , right bracex−02+y−52=1720≤y≤22
