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For the first several weeks after hiring a private tutor, Teddy’s score on a standardized test increased slowly. As Teddy began to understand the concepts more clearly, though, his standardized test scores improved more rapidly. After several more weeks, Teddy stopped working with his tutor and his scores did not improve any more. Which of the following graphs could represent all of Teddy’s standardized test scores as a function of time, in weeks, after he hired a private tutor?

25 Jun

For the first several weeks after hiring a private tutor, Teddy’s score on a standardized test increased slowly. As Teddy began to understand the concepts more clearly, though, his standardized test scores improved more rapidly. After several more weeks, Teddy stopped working with his tutor and his scores did not improve any more. Which of the following graphs could represent all of Teddy’s standardized test scores as a function of time, in weeks, after he hired a private tutor?

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