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Algebra / Linear functions Difficulty: Easy

For a training program, Juan rides his bike at an average rate of 5.7 minutes per mile. Which function m models the number of minutes it will take Juan to ride x miles at this rate?

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Explanation

Choice D is correct. It′s given that Juan rides his bike at an average rate of 5.7 minutes per mile. The number of minutes it will take Juan to ride x miles can be determined by multiplying his average rate by the number of miles, x , which yields 5.7x. Therefore, the function mx=5.7x models the number of minutes it will take Juan to ride x miles.

Choice A is incorrect and may result from conceptual errors. 

Choice B is incorrect and may result from conceptual errors. 

Choice C is incorrect and may result from conceptual errors.