What do I need to put down for these?

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Thelime contains the point(-3,0) and parallel x-3y=3( show all work)

Kayla made observations about the sellin price of a new brand of coffee that sold in the three different sized bags she recorded those observations in the following table 6 is $2.10 8 is $2.80 and 16 is to $5.60 use the relationship to predict the cost of a 20oz bag of coffee.