Question 1142630
In a given year, there are two cost options.  For nonmembers and members, respectively, the costs are:<br>
{{{ C[1] = 10h }}}
{{{ C[2] = 4h+300 }}}

<br>

The breakeven point is where these are equal:  
10h = 4h+300
6h = 300
h = 50 hours<br>

If a person is going to play more than <b>50 hours</b> of tennis in a year, it is less expensive if they become a member.  (See green line in graph below)<br>


{{{ graph(400,400,-100,300, -100, 900, 10x, 4x+300) }}}