A study was conducted to model the linear relationship between Las Vegas nightly hotel cost (dollars) and hotel rating (on a 100 point scale). Nightly hotel cost will be used to predict hotel rating. A random sample of 30 Las Vegas hotels was collected and an estimated slope (b1) was found to be 0.21. Which of the following is a correct interpretation of the estimated slope (b1)?

 
 
 
 
 
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