Can someone help me please

Next, chad created this graph with ordered pairs that show the possible ratios of the number of damage to defense cards in his deck. what error chad make?

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?