Lines 3 and 6 compare one penetration slot to two HA slots.
7
Expression 8: "y" equals StartFraction, 1.2 8 7 5 Over left parenthesis, StartNestedFraction, 1.5 7 5 NestedOver 1 plus .0 0 3 4 "x" , EndNestedFraction , right parenthesis , EndFractiony=1.28751.5751+.0034x
8
Expression 9: "y" equals StartFraction, left parenthesis, StartNestedFraction, 1.2 8 7 5 NestedOver 1 plus .0 0 3 4 left parenthesis, "x" minus 287.5 , right parenthesis , EndNestedFraction , right parenthesis Over left parenthesis, StartNestedFraction, 1.5 7 5 NestedOver 1 plus .0 0 3 4 "x" , EndNestedFraction , right parenthesis , EndFractiony=1.28751+.0034x−287.51.5751+.0034x
9
Lines 8 and 9 compare one penetration and one HA slot to two HA slots.
10
Expression 11: "x" equals 372.1x=372.1
negative 10−10
575575
11
Between PEN/HA and PEN/PEN: to the left of line 11, PEN/HA is more efficient; to the right, PEN/PEN is more efficient.