Question

which of the following remains in direct or inverse proportion 1) number of articles x and their cost y 2) speed x and time y​

Answer 1

1.The number of articles x is directly proportional to their cost y

$here \: \: \: \: \: x \: \alpha \: y$

since when we increase the number of articles ,their cost also increases

2. speed x is inversely proportional to time y

$\: here \: \: \: x \: \alpha \: \frac{1}{y}$

since when speed increases ,the time we travel decreases