運算式 42: "y" equals .4 3 "x" minus 1.9 5 left brace, negative 4 less than or equal to "x" less than or equal to 8 , right bracey=.43x−1.95−4≤x≤8
42
運算式 43: "y" equals .2 7 "x" minus .6 7 left brace, negative 3.9 less than or equal to "x" less than or equal to 1.5 5 6 , right bracey=.27x−.67−3.9≤x≤1.556
43
運算式 44: "y" equals .2 7 "x" minus .6 7 left brace, 3.0 1 8 less than or equal to "x" less than or equal to 8 , right bracey=.27x−.673.018≤x≤8
