Answer
See below.
Work Step by Step
If $\rho$ is 0, then there isn't any linear correlation, hence the slope of $\beta_1$ (regression line) will be 0.
Elementary Statistics (12th Edition)
by Triola, Mario F.
Published by
Pearson
ISBN 10:
0321836960
ISBN 13:
978-0-32183-696-0
Chapter 10 - Correlation and Regression - 10-3 Regression - Beyond the Basics - Page 531: 33
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