Question

Inversely, Direct or Neither (Variations) .
y/x = 3
-5 = xy
y = 8x

Answer 1

I say last was is direct and 1st two are neither because 1st one is set to y/x not y or x and the 2nd one is xy but not to in respect to x or y.

Answer 2

Last one* not last was

Answer 3

This is what they look like:
1) \[\frac{ y}{x }=3\]
2) \[-5=xy\]
3)\[y=8x\]

Answer 4

Yeah I know. #1 and #2 are neither and #3 is direct

Answer 5

It's easier to tell if you make them say y =

Answer 6

Look two posts up, I did.

Answer 7

\[\frac{y}{x}\times x=3x\]
y=3x

Answer 8

Clearly direct variation.

Answer 9

So that's for the first one?

Answer 10

Oh no, the third one I mean?

Answer 11

Where did you solve them for y? I can't find it.

Answer 12

That's how the equation is shown. It's not being solved, it's just asking to state what kind of variation it is.

Answer 13

Yeah I was about to say the question didn't say it needed to be solved

Answer 14

Number 1:
\[\frac{y}{x}=3\]
\[\frac{y}{x}\times x=3\times x\]
\[y=3x\]

Answer 15

So that's direct?

Answer 16

Number 2
\[-5=xy\]
\[xy=-5\]
\[\frac{xy}{x}=\frac{-5}{x}\]
\[y=\frac{-5}{x}\]

Answer 17

Number 3
\[y=8x\]

Answer 18

Now which one(s) are of the form y =kx? Those are direct variation.
Which one(s) are of the form :
\[y=\frac{k}{x}\]
Those are indirect variation.

Answer 19

Do you mean inverse variation? & Would it be #3?

Answer 20

Indirect and inverse are the same thing.

Answer 21

Oh okay , haha sorry. So, #1 is indirect, #2 is ? , #3 is direct?