Which is the direct linear variation equation for the relationship?

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

A.
y = x + 8

B.
y = 2x + 4

C.
y = 3x

D.
y = x – 8

Question

Which is the direct linear variation equation for the relationship?

y varies directly with x and y = 12 when x = 4.
 
 
 A.
y = x + 8
 
 B.
y = 2x + 4
 
 
 C.
y = 3x
 
 D.
y = x – 8

anonymous · Answer

@iGreen @NeonStrawsForever @razorghost @rvc @tylermcmullen23

rvc · Answer

do you know the equation for direct variation?

anonymous · Answer

no

anonymous · Answer

is it y=mx+b

anonymous · Answer

i think it might be C.

rvc · Answer

$$\huge y~ \alpha~ x$$

anonymous · Answer

y=a+x?

rvc · Answer

therefore y=kx where k is a constant

anonymous · Answer

y varies directly with x and y = 12 when x = 4. 
(Points: 4) 
y=kx 
y/x=k 
3=k 

Option C: y = 3x

anonymous · Answer

so it would be c then?

anonymous · Answer

id say (:

rvc · Answer

@Crumby no direct answers please

anonymous · Answer

oh i remember this now thank you guys

anonymous · Answer

i gave a problem for her/he to figure out and the answer is Attached no direct answers at all (;

rvc · Answer

All the best !!!

rvc · Answer

you got to explain her

dmndlife24 · Answer

A direct answer - with or without an explanation - is still a violation of the CoC

anonymous · Answer

yes im just here to help and give an explanation

anonymous · Answer

did not read that at all been on here for a hour thats it so i honestly don know where im at fault

rvc · Answer

okay
but now you know that giving direct answers is against the rules
never do that again :)