EarthCare decides to sell T-shirts to raise money. The company makes an initial investment of $100 to pay for the design of the T-shirt and to set up the printing process. After that, the T-shirts cost $5 each for labor and materials.

1. Express the average cost, $C\text{,}$ per T-shirt as a function of the number of T-shirts EarthCare produces.
   $C=$
2. Make a table of values for the function.

   $x$	$1$	$2$	$4$	$5$	$10$	$20$
   $C$

3. Graph the function and explain what it tells you about the cost of the T-shirts.