Chapter 5.7, Problem 17P

Writing Describe how the slope of a line relates to a trend line. What does the $y$-intercept represent?

To determine

To explain:Describe how the slope of a line relates to a trend line. What does the $y-$ intercept represent?

Explanation of Solution

The slope of a line is nothing but rate of change of a line, which is same over the line at every point. Slope is also called the trend of the trend line.

Generally slope can be of 2 types, positive and negative, A positive slope implies positive correlation and vice-versa.

The $y-$ intercept represents the value of $y$ at the value of $x=0$ or we can say that the $y-$ intercept represents the initial value of the data.