Question

Anyone here good with direct variation? I NEED HELP ASAP!

Answer 1

you need the formula?

Answer 2

oh ya the formula is y=kx

Answer 3

sry bout that

Answer 4

if it is direct variation, it will look like \(y=mx\) and you can find \(k\) by \(k=\frac{y}{x}\)
pick any pair you like
for example the pair \((6,9)\) gives
\[k=\frac{9}{6}=\frac{3}{2}\]

Answer 5

giving
\[y=\frac{3}{2}x\]

Answer 6

you can find the same \(\frac{3}{2}\) by using any other pair

Answer 7

for example \(\frac{6}{4}=\frac{3}{2}\)

Answer 8

so there is direct variation?

Answer 9

my table does not have 6/4

Answer 10

it has a row with \(x=4,y=6\)

Answer 11

oh ok so y goes over x?

Answer 12

yes it does

Answer 13

I have a question for you

Answer 14

that is , if you want to find \(k\) so you can write
\[y=kx\] then you can find \(k\) by taking \(\frac{y}{x}\) for a specific \(y\) and \(x\)

Answer 15

you could have picked
\[k=\frac{-3}{-2}=\frac{3}{2}\] as well

Answer 16

I sometimes have questions with the x bigger than the y and I don't know how to work them out here is an example: y is 10 when x is 12

Answer 17

I be back hv to take trash out will only take a minute very close

Answer 18

it makes no difference which one is larger

Answer 19

\[k=\frac{10}{12}=\frac{5}{6}\]

Answer 20

i used to take out the trash

Answer 21

ok lol thanx! :)

Answer 22

now i only take out nice girls

Answer 23

yw

Answer 24

I need help with another table will you help me please?

Answer 25

sure

Answer 26

c'mon i bet you can guess \(k\)
pick any pair and compute \(\frac{y}{x}\) let me know what you get
(don't pick \((0,0)\) )

Answer 27

ok I picked 9/6 and I simplified it and got 3/2 then I did 4/6 and it = 2/3 I don't think this is direct variation

Answer 28

i don't see either of those in that table

Answer 29

oh sorry I was looking at wrong table lol

Answer 30

i see
\[\frac{-4}{-8}=\frac{-3}{-6}=\frac{1}{2}=...\]
they are all \(\frac{1}{2}\) when reduced

Answer 31

Oh I get it I just did each one on the table and got .5 THERE IS DIRECT VARIATION YAY!! :)

Answer 32

yup, that is what you have to check, and that is all there is to it

Answer 33

I don't think there is direct variation for the table I posted earlier

Answer 34

yes
every pair gives \(\frac{3}{2}\) when reduced

Answer 35

So there was no direct variation for the table I posted earlier? Or was there?

Answer 36

oh never mind there is lol! Thanks for your help satellite73! :)

Answer 37

yes, there is
it is
\[y=\frac{3}{2}x\]