Question

What is the constant of proportionality in the equation x/y =2/9

A:2/9

B:2

C:9/2

D:9

Answer 1

C.9/2

Explanation:

equation for inverse proportion y= k/x

y=9/x

⇒constant of proportionality =k=9

Answer 2

Answer: C) 9/2

Explanation:

Yoy have the following direct proportion:

`x=ky`, where:

k is the constant of proportionality.

When you solve for y, you obtain:

`y=x/k`

The problem gives you the porportion x/y=2/9

Therefore when you solve for y you obtain:

`y=x*9/2`

Then:

`k=9/2`

OPTION C