Старший ребенок пишет проверочную работу в конце урока:
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Which of the following best describes the graph below?

A coordinate grid with the graph of a hyperbola.  The x-axis extends from negative 5 to 5. The y-axis extends from negative 5 to 5. The hyperbola's asymptotes are the x-axis and y-axis. The hyperbola's center is at the origin. The upper branch of the hyperbola is in first quadrant. The lower branch of the hyperbola is in the third quadrant.   















Correct Answer

It is not a function.
Incorrect Response


It is a one-to-one function.


It is a function, but it is not one-to-one.



It is a many-to-one function.

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The greatest integer function, shown below, is defined so that it produces the greatest integer________ or equal to x.

f open argument  x close argument equals open square brackets x close square brackets

   less      Incorrect Response

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Ну да, f(x) = 4/х это не функция, а термина "less or equal" не существует.  Вчера было аналогично с "greater" и "bigger". А потом меня спрашивают, хорошую ли программу предлагает наша онлайн школа.
На всякий случай: нет, ребенок не изучает математику по этим материалам, только сдает :))
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