Question

Write three functions. In the first function, y should vary directly with x. In the second function, y should vary inversely with x. In the third function, the relationship between x and y should be neither inverse variation nor direct variation.

Answer 1

1) y = kx . . . . . for some constant k

.. Here y is directly proportional to x , where k is the constant of proportionality

2) y = k/x . . . . for some constant k

.. Here y is inversely proportional to x , again k is the constant of proportionality.

3) y = 2x +52

..

Here y is linearly related to the x , it is neither directly proportional nor inversely proportional.

Answer 2

Asked and answered elsewhere.
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