Well for starters that would be $108/6 weeks when a unit rate is anything over one. To put it as a unit rate (how many dollars per hours) you just divide $108 by 6 (since you would divide 6 by 6 to get) and the unit rate would end up being $18 per hour.
Um I think the answer is 3
The club would have to sell at least 6 t-shirts.
Y= 4/3x -1 use y2-y1 over x2-x1