Reason
Let's make a table of values. A spreadsheet or graphing calculator that supports tables is recommended.
[tex]\begin{array}{|c|c|} \cline{1-2}h & 80/h\\\cline{1-2}1 & 80\\\cline{1-2}2 & 40\\\cline{1-2}4 & 20\\\cline{1-2}8 & 10\\\cline{1-2}16 & 5\\\cline{1-2}20 & 4\\\cline{1-2}40 & 2\\\cline{1-2}80 & 1\\\cline{1-2}\end{array}[/tex]
As h gets bigger, the expression 80/h gets smaller, and vice versa. The two expressions go in opposite directions.
This will mean as h gets smaller, then 80/h gets bigger, and vice versa.
Notes: