3. if phs stock sold for $38.50 a share yesterday and today it closed at $37.20. what percent
gain/loss did the stock have in that day?

See picture for reply and solution steps.

the answer is a beach is the best place to be

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.