An online shopping website collected data regarding its operations and obtained the following linear regression model for the estimated revenue in millions, , based on the click-through rate in thousands, x.
= 1.2 + 0.2 x
What is the best interpretation of the value of the estimated slope of 0.2?
a. Every click on the website causes $0.2 million more revenue.
b. The estimated change in the click- through rate is 0.2 thousand for each for each one million in revenue.
c. The estimated change in revenue for each additional thousand clicks is $0.2 million.
d. When there are no clicks on the website, the estimated revenue is $0.2 million.