Follow the below steps:
1. Add the feedback column in column shelf and the product in row shelf.
2. Make the aggregation on the feedback column as count.
3. Now create a calculated field to find the average for each product using AVG([Feedback]).
4. Now drag and drop the calculated field for average in the shelf.
5. if avg field is not a line chart, make it as a line chart
6. Now make a dual axis chart using both the avg field and the feedback field.
Now you can get the graph you wanted.
Hope it helps you.