Question

I medal!!!!!
A direct variation includes the point (-8, 2). Which is an equation of the direct variation?

y = -4x
y = x/-4
2y = -8x
-8y = x + 2

Answer 1

Direct variation means this form:

y = k*x

Use the point (x,y) = (-8,2) in that, and figure out the value of k

Answer 2

2 = k * (-8)

k = 2/(-8) = -1/4

Answer 3

so the direct variation is

y = k*x

y = (-1/4) *x

Answer 4

or in the form of the answers

\[y = \frac{ x }{ -4 }\]

Answer 5

Thanks! :")