Chapter 6.5, Problem 48SR

To determine

Whether the rental charge is proportional to the time.

Answer to Problem 48SR

The rental charge is not proportional to time.

Explanation of Solution

Given information:

  

Calculation:

Simplify the ratio of time and rental charge for each observation:

  $\frac{1}{13},\frac{2}{23},\frac{2}{33}=\frac{1}{11},\frac{4}{43}$

Since the four ratios are not equal.

That is,

  $\frac{1}{13}\ne \frac{2}{23}\ne \frac{1}{11}\ne \frac{4}{43}$

So, these pairs do not represent proportion.

Hence, the rental charge is not proportional to time.