1. Yes, there is a linear correlation between the amount of time students play video games and their GPA, as indicated by a significant correlation coefficient.

2. The correlation coefficient is $r = -0.8856$.

3. The regression equation is $\hat{y} = -0.1839x + 3.4430$, where $\hat{y}$ represents the predicted GPA and $x$ represents the hours of video games played.

4. A student who plays video games for 15 hours each week is predicted to have a GPA of approximately 0.68.

Would you like more details or have any questions?

Here are 5 related questions:

1. How is the strength of correlation determined?
2. What does a negative correlation imply in this context?
3. Can correlation imply causation between video games and GPA?
4. What are potential factors that could affect GPA besides video game time?
5. How would the regression change if outliers were present?

Tip: Always check the p-value to confirm the statistical significance of a correlation before interpreting its strength.