*Will give medal!* Which is the direct linear variation equation for the relationship?
y varies directly with x and y = 10 when x = 2.

A. y = x – 8
B. y = x + 8
C. y = 5x
D. y = 2x + 6

Question

*Will give medal!* Which is the direct linear variation equation for the relationship?
y varies directly with x and y = 10 when x = 2.
 
A. y = x – 8
B. y = x + 8
C. y = 5x
D. y = 2x + 6

anonymous · Answer

the one without a $+whatever$ at the end

anonymous · Answer

@satellite73 what do you mean? lol just say the letter. And if you could explain how you got the answer that would be helpful.

anonymous · Answer

Since x = 2, 5x = 10.
Since y = 10, Then the answer is C.

anonymous · Answer

oh thanks so much

anonymous · Answer

But that isn't a full explanation

anonymous · Answer

The rule for a direct variation is y=kx

Plug in y=10 and x=2 in the equation and you'll get k=5

Replug the value of k in y=kx and you will get y=5x

anonymous · Answer

K is the constant

anonymous · Answer

yeah that made more sense