Final answer:
To calculate the kicking rate per hour, divide the total number of kicks by the total hours of observation. Sally kicked 7 times over a 2-hour period, resulting in a kicking rate of 3.5 kicks per hour.
The correct option is b.
Step-by-step explanation:
The student is trying to determine Sally's kicking rate per hour based on the observation that she kicked 7 times between 1pm and 3pm. To find the rate per hour, the total number of kicks should be divided by the total number of hours observed.
Total number of kicks = 7
Total observation time = 2 hours (from 1 pm to 3 pm)
Kicking rate per hour = Total kicks / Total hours
Kicking rate per hour = 7 kicks / 2 hours
Kicking rate per hour = 3.5 kicks per hour
Therefore, the correct answer is b. 3.5 per hour.
The correct option is b.