Expression 6: "X" left parenthesis, "t" , right parenthesis equals StartFraction, StartAbsoluteValue, "t" , EndAbsoluteValue Over "t" , EndFraction left parenthesis, "X" Subscript, 1 , Baseline left parenthesis, "t" , right parenthesis plus "X" Subscript, 2 , Baseline left parenthesis, "t" , right parenthesis plus "X" Subscript, 3 , Baseline left parenthesis, "t" , right parenthesis plus "X" Subscript, 45678 , Baseline left parenthesis, "t" , right parenthesis plus "X" Subscript, 9 , Baseline left parenthesis, "t" , right parenthesis plus "X" Subscript, 10 , Baseline left parenthesis, "t" , right parenthesis plus 7 eighths , right parenthesisXt=ttX1t+X2t+X3t+X45678t+X9t+X10t+78
6
Expression 7: "Y" left parenthesis, "t" , right parenthesis equals "Y" Subscript, 1 , Baseline left parenthesis, "t" , right parenthesis plus "Y" Subscript, 2 , Baseline left parenthesis, "t" , right parenthesis plus "Y" Subscript, 3 , Baseline left parenthesis, "t" , right parenthesis plus "Y" Subscript, 4 , Baseline left parenthesis, "t" , right parenthesis plus "Y" Subscript, 6 , Baseline left parenthesis, "t" , right parenthesis plus "Y" Subscript, 789 , Baseline left parenthesis, "t" , right parenthesis plus "Y" Subscript, 11 , Baseline left parenthesis, "t" , right parenthesis plus "Y" Subscript, 12 , Baseline left parenthesis, "t" , right parenthesis plus 6.3 9 8Yt=Y1t+Y2t+Y3t+Y4t+Y6t+Y789t+Y11t+Y12t+6.398