15. To determine the percentage of teenage girls with long hair, Teen magazine published a mail-in questionnaire. Of the 500 respondents, 85% had hair shoulder length or longer (USA Today, July 1, 1985).

Sample response: if the graph passes the horizontaline test, then the function is one to one. functions that are one to one have inverses that a therefore, the inverse is a hinction compare your response to the sample response above. what did you include in your explanation? a reference to the horizontal-line test d a statement that the function is one-to-one the conclusion that the inverse is a function done