Regression analysis was applied between House Price(in $1000s) and square footage of the house, and the following regression function was obtained. Ỹ =100 +5x The above equation implies that an increase of 1 in square footage is associated with an increase of $5,000 in price 5 in square footage is associated with an increase of $1,000 in price $1 in square footage is associated with an increase of $5,000 in price 1 in square footage is associated with an increase of $56,000 in price

A researcher wanted to predict the sodium content (in milligrams) of beef hot dogs by looking at the calorie content.  His findings from a sample of 10 beef hot dogs are summarized below. The regression equation for his data is          ŷ= -299.48 + 4.35 x    Calories  186  181  176  149  184  190  158  139  175  148  Sodium  495  477  425  322  482  587  370  322  479  375                                                                                 Interpret the slope in terms of this problem.  If appropriate, find the sodium content if the calorie content is 170. If not, why?  If appropriate, find the sodium content if the calorie content is 136. If not, why?

2. The table below lists the annual land-line phone cost per costumer: Year 2012 2013 2014 2015 Cost ($) a. 692 610 Find a linear regression model for this data b. Interpret the slope of the model 580 C. Predict the annual land-line phone cost per customer in 2022 495 2016 434

A sports-equipment researcher was interested in the relationship between the speed of a golf club (in feet per second) and the distance a golf ball travels (in yards). Information was collected on several golfers and was used to obtain the regression equation ŷ = 2x - 106, where x represents the club speed and ŷ is the predicted distance. Which statement best describes the meaning of the slope of the regression line? For each increase in distance by 1 yard, the predicted club speed increases by 2 ft/sec. For each increase in distance by 1 yard, the predicted club speed decreases by 106 ft/sec. For each increase in club speed by 1 ft/sec, the predicted distance increases by 2 yards. For each increase in club speed by 1 ft/sec, the predicted distance decreases by 106 yards.