chapter 1

Chapter 12: Simple Linear Regression and Correlationb. The scatter plot with axes intersecting at (55, 100) is shown below.Temperature (x) vs Elongation (y)250200y:1501005 5 65 75 85x:c. A parabola appears to provide a good fit to both graphs.6. There appears to be a linear relationship between racket resonance frequency and sum ofpeak-to-peak acceleration. As the resonance frequency increases the sum of peak-to-peakacceleration tends to decrease. However, there is not a perfect relationship. Variation doesexist. One should also notice that there are two tennis rackets that appear to differ from theother 21 rackets. Both have very high resonance frequency values. One might investigate ifthese rackets differ in other ways as well.7.a. µ = 1800 + 1.3( 2500) 5050Y⋅2500 =b. expected change = slope = β1=1. 3c. expected change = 100β1= 130d. expected change = −100β1= −130355