Chapter 11.6, Problem 8LC

To determine

Does the price per pencil necessarily vary inversely with the no. of pencils bought?

Answer to Problem 8LC

Yes, the price per pencil necessarily vary inversely with the no. of pencils bought.

Explanation of Solution

Given information:

Suppose the price per pencil at an office supply store decreases as the numbers of pencils you buy increases.

Calculation:

Let cost of one pencil = x

and no. of pencils buy = y

According to question

Cost of one pencil is inversely proportional to no. of pencils you buy.

  $\begin{array}{l}x=\frac{k}{y}\\ wherekiscons\tan t.\end{array}$

If no. of pencils increases then the cost of one pencil decreases and if no. of pencils decreases then the cost of one pencil increases.