Kylie sells 2 concert tickets every minute. She has already sold 8 tickets. If f (t) represents the total number of tickets that Kylie will sell in t minutes, which of the following functions represents the relationship between f (t) and t? f (t) = 8t - 2 f (t) = 2t - 8 f (t) = 2t + 8 f (t) = 8t + 2

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Mathematics

11 March, 20:42

Kylie sells 2 concert tickets every minute. She has already sold 8 tickets. If f (t) represents the total number of tickets that Kylie will sell in t minutes, which of the following functions represents the relationship between f (t) and t? f (t) = 8t - 2 f (t) = 2t - 8 f (t) = 2t + 8 f (t) = 8t + 2

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Salinas · Answer 1

F (t) = 2t + 8

If t stands for the number of minutes she has been selling tickets, then we know that we must have 2t in the equation since she sells 2 tickets per minute. And since the only two left are either f (t) = 2t - 8 or f (t) = 2t + 8, the answer must be

f (t) = 2t + 8 because she is 8 tickets, not - 8.