It is believed that the sales volume of one-liter Pepsi bottles depends on the price of the bottle and the price of a one-liter bottle of Coca-Cola.The following data have been collected for a certain sales region. 
Using Excel's regression,the linear model Pepsi Sales = β0 + β1Pepsi Price + β2Cola Price + ε and the log-log model ln(Pepsi Sales)= β0 + β1ln(Pepsi Price)+ β2ln(Cola Price)+ ε have been estimated as follows: 
For the estimated log-log model,interpret the estimated coefficient of ln(Pepsi Price).
Definitions:
Inferior Good
A type of good for which demand decreases as the income of consumers increases, contrasting with normal goods.
Normal Good
A good for which demand increases when consumer income rises, and decreases when consumer income falls.
Inferior Good
A category of products whose demand falls when consumer income rises, showing an inverse relationship with changes in income.
Giffen Good
A good for which an increase in the price raises the quantity demanded
Q23: Which of the following is the Fisher's
Q31: A time series with observed long-term upward
Q34: One of the disadvantages of Fisher's LSD
Q57: It is believed that the sales volume
Q68: The accompanying table shows the regression results
Q83: The following frequency distribution shows the monthly
Q93: To examine the differences between salaries of
Q94: Smoothing techniques are suitable for use when
Q95: Tiffany & Co.has been the world's premier
Q118: The chi-square test of a contingency table