Chapter 1, Problem 71A

To determine

To Explain:The slope of the graph.

Answer to Problem 71A

The slope will be negative.

Explanation of Solution

Introduction:

Slope is calculated by the ratio of the vertical change versus the horizontal change in the values of the variables when plotted on a graph.Slope measures the relation between two variables. Whether it is positive, negative or zero.

A positive slope represents a direct relation which means that when one variable increases the other variable also increases. Negative slope represents an inverse relation which means that one variable increases, the other variable decreases.

In the given case, as the days increase, the total money decreases. The vertical change is negative corresponding to a positive horizontal change.

Hence, the slope is negative.

Conclusion:

The slope of the graph of the amount left at the end of each day for one week will be negative.