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cjd1214812148
30.07.2019 •
Mathematics
(04.07) luke is keeping track of the total number of hours he exercises. he started the summer having already put in 15 hours, and he then exercises 7 hours each week. the function to keep track of his exercise is f(x) = 7x + 15. what do the f(x) and x represent in luke's situation?
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Ответ:
f(x) is the total number of hours exercised and x is the number of weeks.
Explanation:
In function notation, we can see which variable is independent. In this case, x is the independent variable.
In the problem situation, the two quantities (variables) are weeks and amount of exercise; the amount of exercise would depend on how many weeks have passed, so weeks is the independent variable, or x.
This means that exercise is a function of weeks. This means that f(x) is the amount of exercise, and x is the number of weeks.
Ответ: