Expression 2: "x" equals 4 left brace, 0 less than or equal to "y" less than or equal to 3 , right brace Has graph. To audio trace, press ALT+T.x=40≤y≤3
2
(x,y) left parenthesis, 4 , 3 , right parenthesis Has graph. To audio trace, press ALT+T.4,3
Label:
3
Expression 4: 3 quarters "x" left brace, 0 less than "x" less than 4 , right brace Has graph. To audio trace, press ALT+T.34x0<x<4