Suppose that y varies directly with x, and y=3 when x=8 (a) write an inverse equation equation that relates equation: (b) find y when x=4

we are given

y varies directly with x

so, we can write equation as

where

k is a constant

now, we need to find k

we are given

y=3 when x=8

so, we can plug it and find k

now, we can plug it back

(A)

we have got equation as

for finding inverse , we can switch x and y

now, we can solve for y

............Answer

(B)

we have

we can plug x=4 and find y

................Answer

true? is that what you're asking or do you mean something else?

step-by-step explanation: