Theo Anh (Chị), phương pháp tính giá thành nào là tối ưu?

Trent wants to buy 2 packs of trading cards for 3 dollars each. the trading card packs that trent normally buys tend to come in packs of 6, 10, 12, or 15 cards. after selecting 2 packs, trent found that the first pack of cards cost 25 cents per card, and the second pack cost 30 cents per card. trent uses this information to write the equations below in order to compare c, the number of cards in each pack.

Which shows the graph of the solution set of 3y – 2x > –18?

Which graph represents the given linear function 4x+2y=3