Question

If I varies inversely with R and I = 0.15 when R = 50, which equation should be used to show this relationship?

Answer 1

`color(blue)(IR) =color(red)(7.5`

Explanation:

Here `color(blue)( R and I` are the variables and let `color(red) k` be the constant

Given:
`color(blue)( I) = 0.15`
`color(blue)( R)= 50`

Inverse variations are denoted as:
`color(blue)(I xx R) = color(red)(k`

So,
`0.15 xx 50 = k`
The constant, `color(blue)( k = 7.5`

The variation can thus be represented as:

`color(blue)(IR) =color(red)(7.5`