Question

Which equation represents a direct linear variation?

A. Y=x^2

B. Y=1/x

C. y = x + 3

D. Y= 2/5x

Answer 1

@freckles help me?

Answer 2

linear is when you have something in the form y=mx+b
or x=a number or y=a number
---
but if have something is directly proportional to something else
then that one something=a constant*the other something
---
so I guess a direct linear variation would be something of a mixture
like y=mx

Answer 3

So the answer would be B?

Answer 4

well that would not be a linear equation

Answer 5

y=mx <---no x is on bottom

Answer 6

Hmmm, SO A?

Answer 7

I think you should invest some time into what I said

Answer 8

y=mx+b
or x=constant or y=constant
are all linear equations

Answer 9

so y=x^2
or y=1/x
or y=sqrt(x)
or not linear
they are not in the form I described

Answer 10

OHHHHHHHH i get it ,it would be C.

Answer 11

Is D
y=2x/5?

Answer 12

\[y=\frac{2}{5}x\]

Answer 13

Yes, the second one

Answer 14

those are the same equation I just mentioned

Answer 15

anyways d is the exact mixture i was talking about

Answer 16

y=mx is a direct linear variation

Answer 17

y=mx+b is a linear equation

Answer 18

but y=mx has the direct proportion we were looking for

Answer 19

Ok im going to review this but thank you for helping me understand it a little better.

Answer 20

as well as the linear

Answer 21

so you understand that d is the answer

Answer 22

Yes

Answer 23

but c I would give partial credit for because it s a linear equation after all

Answer 24

it just didn't have the direct thing going for it