Which answer BEST describes the following step function graph? 1 poin
Cost of T-shirts
20+
15
Price Per Shirt
10
5
10
20
50
60 70
80 90
30 40
Number of Shirts
O The price of Jeshirts goes up by $5 when the quantity of T-shirts is 20 or more
It costs $20 per shirt for the first 20 shirts purchased and then drops to $15 per shirt
if you purchase 21-40 shirts.
O It costs $5 per shirt if you buy 40 or more shirts
O It costs $20 per shirt regardless of how many shirt you buy