Erin writes the set of ordered pairs below. The set represents a function.
{(3, –3), (5, 0), (–1, 4), (–6, 7)}
Erin claims that she can add any point to the set and have the set still represent a function.
Which of the following points can be used to show that Erin's claim is incorrect? Select three that apply.
A.(–6, 1)
B.(–1, 9)
C.(0, 5)
D.(1, 7)
E.(3, –2)

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.