Question

How do you find the direct variation equation of the graph through the points (0, 0) and (1, -10)?

Answer 1

A direct variation equation has the general form
`y = m*x` for some constant value `m`
(note that `(0,0)` will always be a point on the line of a direct variation equation).

Substituting `(1,-10)` for `(x,y)` in the general form
`1 = m*(-10)`
`rarr m= - 1/10`

and the requested direct variation equation is
`y = (-1/10)x`