Lisa is collecting data by interviewing people on the streets. She interviewed 21 people in 3 hours. At this rate, what is the total number of the people she interviewed if she works for a additional 2 hours.

35 interviews

Step-by-step explanation:

1. Find the rate

21/3 = 7 people an hour

2. Find how much she can do in 2 hours

7 x 2 = 14 interviews

3. Add the 2 numbers

21 + 14 = 35 interviews

i believe the correct answer is b.