Question

MEDALS O_O

Does the equation represent a direct variation? If so, find the constant of variation.
5x=-3y

A) no
B) yes; k=-5/3
C) yes; k=5/3
D) yes; k=3/5

those are fractions above, not multiplication ^

Answer 1

equation for direct variation is \[\huge\rm y = k x \]
where k is constant of variation
so you have to solve that equation for y

Answer 2

@magepker728

Answer 3

solve for y

Answer 4

how do i do that if I don't know what x is ?

Answer 5

you don't have to know x value
just solve for y
x stayz same

Answer 6

-3 is multiplying by y
so u have to do opposite of multiply to cancel out -3 on rifht side

Answer 7

right*

Answer 8

so then I have 5x=y ?

Answer 9

nope

Answer 10

divide both side by -3

Answer 11

so 8x=0y ?

Answer 12

how did you get 8 ???

Answer 13

oh whoops, -1.666 . . .

Answer 14

keep that n fraction form

Answer 15

so how did you get -1.66.....

Answer 16

5 divided by -3, right ?

Answer 17

yes right u don't have to divide that as u can see ur answer choices r in fraction frm

Answer 18

so your you get \[\huge\rm y = \frac{ -5 }{ 3} x\]
whaat is k in this equation ??

Answer 19

B ?

Answer 20

so your you get \[\huge\rm y = \frac{ -5 }{ 3} x\]
whaat is k in this equation ??
???
remember equation for direct variation is y = kx