Alex collect cards and have equal numbers of cards. Finn gives of his cards to Alex. a Write the ratio of the number of Finn’s cards to Alex’s cards. Write the ratio in its simplest form. b Alex has 40 more cards than Finn. How many cards does Finn have now? c How many cards do they have altogether?

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.