Question

PLEASE HELP ME

Write the equation of direct variation that includes the given point.
(6, 5)

(4, -8)

Answer 1

Direct variation functions look like this: y = kx

So, they give you an x and a y (since your point is an x,y pair). And you just need to plug them in and figure out what k is.

Answer 2

Also, all direct variation functions go throught he origin, so you have two points.

Answer 3

So, if you have the point (6,5). They y = kx --> 5 = k(6) . Therefore 5/6 = k

Answer 4

And so your direct variation function is: y = (5/6)x

Answer 5

So then, I think they want you to find another direct variation function that contains the point (4,-8)

Answer 6

So what would that direct variation function look like?

Answer 7

And yes, all direct variation functions do go through the origin. :)

Answer 8

y=-2x?

Answer 9

Yes.

Answer 10

Yep :)