Choose the correct answer. If y = kx and x = 5 when y = 8, what is the constant of proportionality?

6) Choose the correct answer.
If y = kx and x = 5 when y = 8, what is the constant of proportionality?
O 3
O 5/8
O 8/5
O 13
7) Choose the correct answer.
If y = kx and x = 9 when y = 7, what is the constant of proportionality?
O 2
O 7/9
O 9/7