If y varies inversely as and y = -6 when x = 4, find the value of y when x = 5.

Question

These are very difficult for me

Answer 1

Inverse variation means that

 

y = k/x,

 

where k is a constant.  Use the given information to find k.

 

k = x₁y₁ = (-6)(4) = -24

 

y = -24/x

 

For x = 5,

 

y = -24/5