Choose the correct answer. If y varies inversely as x and the constant of proportionality is k = 5, what is...

2. Choose the correct answer.
If y varies inversely as x and the constant of proportionality is k = 5, what is y when x = 2?
2.5
7
3
10
3. Choose the correct answer.
If y varies directly as x and inversely as z, and y = 5 when x = 4 and z = 3, find y when x = 8 and z = 5.
7
11
6
4