Part 1: Yes because each input has 1 unique output.
Part 2: The domain is [1, 2, 3, 4, 5]
The answer is 18, the answer is always just the number in the brackets( hope this helps)
You have to divide denominator by numerator to find the constant of proportionality.
Answer: 141.3 in
1. V = πr
h
2. V = (3.14)(
)(5)
3. V = 141.3 in.
Hope this answer helps you!