Chapter 3.2, Problem 2.1CYU

To determine

To find: The regression line using technology.

Answer to Problem 2.1CYU

The regression line is $\widehat{y}=16.3+0.0908x$

Explanation of Solution

Given:

The provided data set is:

Body weight (lb)	Backpack weight (lb)
170	26
187	30
109	26
103	24
131	29
165	35
158	31
116	28

Calculation:

Consider, x is Body weight and y is Backpack weight.

Follow the provided steps of the Ti-83 calculator to find the regression line:

1. Click on STAT > Edit.
2. Enter the data set in ${\text{L}}_1{\text{ and L}}_2$ .
3. Again, press STAT > CALC >LinReg (ax+b).
4. Press Enter.

The obtained output is: $\widehat{y}=16.3+0.0908x$

Thus, the regression equation is $\widehat{y}=16.3+0.0908x$