Question

What is the direct linear variation equation for the relationship?



y varies directly with x and y = 4 when x = 12.



A.


y = x + 8


B.


y = 3x


C.


y = x – 8


D.


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Answer 1

@iGreen @KendrickLamar2014

Answer 2

@Joel_the_boss @iambatman

Answer 3

@iGreen

Answer 4

@77777jeannie77777 @BlossomCake

Answer 5

@bohotness @confluxepic

Answer 6

@Hopkiand002

Answer 7

a direct variation equation is in the form

y = kx k is called the variation constant

so substitute x = 12 and y = 4 to find the value of the constant

and then you'll have your equation

Answer 8

ok thx

Answer 9

which would be k? @campbell_st

Answer 10

you can caclulate k... by substituting the given values of x = 12 and y = 4

Answer 11

?

Answer 12

@campbell_st

Answer 13

solve \[4 = k \times 12\]

Answer 14

i dont understand

Answer 15

@campbell_st is it b?

Answer 16

nope... and I can't see D

direct variation means the y intercept is zero...

so that eliminates A and C

Answer 17

d is y=1/3x

Answer 18

so using the equation I posted

k = 4/12

simplify the fraction.