Question

If y varies directly as x, how do you find the constant of variation if y=32 when x=8?

Answer 1

If `y` varies directly as `x` then `y = kx` for some constant `k`

Substituting `y=32` and `x=8` into this we get

`32=k*8`

Divide both sides by `8` to get `k = 4`