Question

Write the equation of direct variation for x = 4, y = -2.1276.

Answer 1

Any ideas?

Answer 2

no

Answer 3

help?

Answer 4

Do you know the form of a "direct variation"?

Answer 5

y=kx?

Answer 6

Correct.

Answer 7

what now?

Answer 8

The question gives you x = 4, y = -2.1276 what do you think?

Answer 9

-2.12176=k4?

Answer 10

Perfect, now what is the only "unknown" in that equation?

Answer 11

K?

Answer 12

Yes....

Answer 13

what do i do?

Answer 14

idk

Answer 15

$$\Huge-2.12176=k*4$$

Answer 16

Once you know what "k" is you can put it into the direct variation form y = kx, right?

Answer 17

k=-.53044?

Answer 18

i think?

Answer 19

Yes, that is what $$\frac{-2.12176}{4}$$equals :)

Answer 20

ok thankss

Answer 21

Now answer the question and put into the y=kx form please.

Answer 22

Write the equation of direct variation

Answer 23

-2.12176=-.53044(4)

Answer 24

??

Answer 25

That equation says:
-2.12176 = -.53044(4)
-2.12176 = -2.12176 which is a true statement.

The question asks for "Write the equation of direct variation"

Answer 26

so what do i do?

Answer 27

Substitute the value of "k" you calculated into the general form y = kx.

Answer 28

so my answer is -.53044?

Answer 29

Your answer is the asked for equation.

Answer 30

k = -0.53044

Answer 31

thank youuuu so much

Answer 32

$$\Huge y= -0.53044x$$

Answer 33

Since y = kx

Answer 34

thanks brah

Answer 35

Thanks for trying to learn.