Expression 4: "y" equals left parenthesis, 1.0 minus left parenthesis, "f" Subscript, 3 , Baseline left parenthesis, "x" , right parenthesis , right parenthesis Superscript, 0.6 5 , Baseline , right parenthesis Superscript, "t" , Baseliney=1.0−f3x0.65t