A linear regression is represented as: Where: .
- The interpretation of the slope is: <em>For every 1 mile increase in car mileage, there is a $0.0534 decrease in the car price.</em>
- <em>The correlation coefficient is </em><em />
<u>(a) Interpret the slope</u>
The linear model is given as:
Recall that:
By comparison:
From the question, we understand that:
So, the interpretation of the slope is:
<em>For every 1 mile increase in car mileage, there is a $0.0534 decrease in the car price</em>
<em />
<u>(b) The correlation coefficient (r)</u>
We have:
Take square roots of both sides
Hence, the correlation coefficient is
Read more about linear regressions at:
brainly.com/question/18405415