Question

Which of the following is true in case of direct proportions?

• A. As one quantity increases, the other quantity also increases at the same rate.
• B. As one quantity increases, the other quantity decreases at the same rate.
• C. As one quantity changes, another quantity remains the same.
• D. Cannot be used where commodities are used.

Answer 1

The correct option is A As one quantity increases, the other quantity also increases at the same rate.

In direct proportion if one quantity increases, then the other quantity also increases at the same rate or if one quantity decreases, then the other quantity also decreases at the same rate.

For example,
$\begin{array}{cccc}\text{Quantity (Kg)}& 1& 2& 3\\ \text{Price(Rs)}& 60& 120& 180\end{array}$

We can see that the price increases as the quantity increases.