Question

The value of y varies directly with the value of x, and y = –8 when x = 4.



Which equations represent the relationship between y and x?



Choose exactly two answers that are correct.
A.y/x=1/2
B.y/x=-2
C.-2x=y
D.x=2y

Answer 1

@Baby_Bear69

Answer 2

@iGreen yeah can you help me? :)

Answer 3

Direct variation:

y = kx

Answer 4

Plug in y = -8 and x = 4, then solve for 'k'.

Answer 5

so k= -2?

Answer 6

Yep!

Answer 7

Now plug in -2 for 'k' in y = kx.

Answer 8

so -2*4=-8?

Answer 9

Just plug in -2 for 'k' in 'y = kx', don't simplify anything.

Answer 10

:/ ? im confused sorry :)