Question

How do you find the constant of variation, and write an equation of direct variation: y=5 when x=-0.1?

Answer 1

`y = -50 x`

Explanation:

Direct variation,
`y = k x`, where `k` is a constant.

plug `y = 5 and x = -0.1` in the above equation.
`5 = k (-0.1)`
`k = 5/-0.1 = -50`

therefore, it equation is
`y = -50 x`