Chapter 4.5, Problem 15E

To determine

To describe: The error in interpreting the graphing calculator display and to further correct it.

Answer to Problem 15E

Correct equation is $y=-4.47x+23.16$ .

Explanation of Solution

Given information: The incorrect equation of the line of best fit is $y=23.16x-4.47$ .

Slope intercept form is $\text{y=mx+b}$ .

Given graphing calculator displays that $\text{b=23}\text{.16}$ and slope $\text{a=-4}\text{.47}$ .

In the line of best fit these values are incorrectly substituted (they are interchanged),

Thus, the correct equation is $y=-4.47x+23.16$ .