Answer:
Hope this helps
Explanation:
T means amount of t shirts they are buying
5.99 is amount of shipping cost
first do 32.24-5.99=26.25
then do 26.25/3=8.75
so 8.75= cost of shirt
20a. (8.75*T)+5.99
20b.(I might get this part wrong just let me know)
M=Y2-Y1/X2-X1
so 32.24-5.99/3-0= 26.25/3 Or 8.75
20c=Y=Mx+B
3=8.75(32.24)+b=-279.1