A movie website wants to conpute the overall average rating of a movie, considering the different reviewers wha have rated the movie, with each reviewer having different numbers of followers (weight). reviewer a: avarage rating 4.5 with 200 folowers

To compute the overall average rating of a movie while considering the weights (followers) of different reviewers, you can use a weighted average formula. The weighted average formula is given by:

\[
\text{Weighted Average} = \frac{\sum (\text{rating} \times \text{weight})}{\sum \text{weight}}
\]

Where:
- Rating refers to the average rating given by a reviewer.
- Weight refers to the number of followers the reviewer has.

For **Reviewer A**:
- Average rating = 4.5
- Followers (weight) = 200

Since we have only one reviewer in this example, the overall average rating will be:

\[
\text{Overall Average Rating} = \frac{(4.5 \times 200)}{200} = 4.5
\]

So the overall weighted average rating is **4.5** for now.

If there are additional reviewers with their own ratings and follower counts, you can apply the same formula by summing the products of their ratings and followers, then dividing by the total number of followers.

Would you like to add more reviewers to this calculation, or do you need more details?

### Example Questions:
1. How would you compute the overall rating if there were 3 reviewers?
2. How does weighting by followers affect the average rating?
3. What if Reviewer A's follower count were doubled, how would that change the result?
4. Can the weighted average formula be used for other metrics besides ratings?
5. How would the calculation change if some ratings were negative?

**Tip:** Always verify the weights (follower counts) before calculating the weighted average, as they heavily influence the result.

A movie website wants to compute the overall average rating of a movie, considering the different reviewers who have rated the movie, with each reviewer having different numbers of followers (weight). Reviewer A: average rating 4.5 with 200 followers.

Learn how to compute the overall average rating of a movie by considering the weighted average formula, which accounts for different reviewers and their follower counts. In this example, Reviewer A provides an average rating of 4.5, with 200 followers. Suitable for Grades 9-12.

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