Question

Determine whether y varies directly with x. If so, find the constant of variation k.

3y = –7x – 18

Answer 1

@agent0smith

Answer 2

For the constant of variation, we need it to look like y = kx.

Let's divide both sides of 3y = –7x – 18 by 3, to get
\[y = -\frac{7 }{ 3 }x –\frac{ 18 }{3 }\]
Try comparing
\[y= kx \]to\[y = -\frac{7 }{ 3 }x –\frac{ 18 }{3 }\]

Answer 3

so is the answer B?

Answer 4

@agent0smith

Answer 5

But notice that we have\[ y = -\frac{7 }{ 3 }x –\frac{ 18 }{3 } \]
Does it look like y=kx? or y=kx minus 18/3?

Answer 6

no they don't so its D

Answer 7

For constant of variation, you only want y = kx, not y = kx plus or minus some number.

Answer 8

so there is no constant of variation its no

Answer 9

Correct :)

*If* it was just \[y = -\frac{7 }{ 3 }x\] then it would be in the form y = kx.

Answer 10

thanks baby xo

Answer 11

haha no prob :)