The answer would be 413,000,000 and 4,000
Answer: 
Step-by-step explanation:
1. Use this 
to find the average rate of change
2. Average rate of change = 
3. 
and 
(To find these you will need to look at the points on the graph. So the points (8,-4) and (6,-10))
4. Replace -4 to f(8) and -10 to f(6)
5. So it will look like
6. Solve
For part A add up all your students then add up all your students that like bike riding and skating (80+90) divide that by the total number of students who took the survey
For Part be put 20+40 over the toatl number of student then simplify
