Use the Following Information for Questions:
a Regression Was $\hat{y}$

Short Answer

Use the following information for questions:
A regression was done for 20 cities with latitude as the explanatory variable (x) and average January temperature as the response variable (y). The latitude is measured in degrees and average January temperature in degrees Fahrenheit. The latitudes ranged from 26 (Miami) to 47 (Duluth) The regression equation is $\hat{y}$ = 49.4 - 0.313x.
-What is the value of the correlation coefficient r?