Answer:
The number of participants who knocked down 7 pins are:
2
Explanation:
The line plot provided to us represents the number of pins each participant knocked down.
i.e. the dots above the line represent the number of participants who knocked down that particular number of pin.
Based on the line plot we have following table:
Number of Pins Number of participant(i.e. number of dots)
4 1
5 1
6 0
7 2
8 2
9 6
10 4
Hence , we have that 2 participants knocked down 7 pins.