Chapter 14, Problem 8STP

Interpretation Introduction

Interpretation: The graph which shows slope zero is to be determined.

Concept introduction: Zero slopes correspond to a perfectly horizontal line. The values of variables are independent. It is neither increasing nor decreasing.

Answer to Problem 8STP

The correct option is (B).

The graph of slope zero is given below.

  

Explanation of Solution

The given option of the graphs are as follows:

  

  

  

Reason for the correct option:

Graph B is a horizontal line. The values of variables are independent of each other. Therefore, graph B depicts a line with a slope of zero.

  

Conclusion

Reason for the incorrect options

Since graphs A and C does not form a horizontal line, the slope is not zero.