Question

PLEASE HELP I"LL GIVE MEDAL
Which of the following represents a direct variation?

An y table shows the following coordinate pairs: ten comma seven, thirty-five comma two, and five comma fourteen.
An y table shows the following coordinate pairs: ten comma seven, thirty-five comma two, and five comma fourteen.
Lance bought 3 CDs and spent forty-five dollars. Jacob bought 5 CDs and spent sixty-five dollars.

y equals five-eighths x

I will post the table in the comment section

Answer 1

here is the table

Answer 2

Divide y by x. If you always get the same number, it is a direct variation.

Answer 3

please note that when it begins to say lance bought 3 cd's that is a different option

Answer 4

i did that, i still can't tell

Answer 5

when i divide x and y values in the table they all come out messed up on the calculator like 3.1111111111 and the other ones i did didn't make much sense either,

Answer 6

I'm not giving medal for that

Answer 7

Why don't you just write the ordered pairs instead of something comma something

Answer 8

So according to your division results, it can't be the table.

Answer 9

It can't be the CD's because 45/3 is not the same as 65/5

Answer 10

yes just by looking at the pattern of the table, it looks inverse

Answer 11

it's has to be one of the other 2 and C just confuses me

Answer 12

So look at the equation, y = 5/8 x
y/x=5/8

Answer 13

Doesn't look like that will ever change.

Answer 14

what/ what are you talking about

Answer 15

your third option

Answer 16

What are you talking about?

Answer 17

Omg i justed asked if you knew how to do it not a long confusing debate I THINK IT'S B

Answer 18

Wait you said back ther it can't be cd's but how does the other one make sense?

Answer 19

how does y = 5/8 x make sense

Answer 20

No matter what ordered pair makes that sentence true, when you divide y by x you will always get 5/8

Answer 21

ok so your point is? that nakes it direct variation? whatever, thanks for the help

Answer 22

Remember, at the very beginning we said if it is a direct variation, when you divide y by x you will always get the same number.

Answer 23

kind of

Answer 24

So we found out that didn't work for the table they gave us.

Answer 25

We also found out that it didn't work for the CD choice

Answer 26

ok then process of emimination. Thx

Answer 27

That brought us to the equation y = 5/8 x. And it does work for that one.

Answer 28

Also you should learn that another common form of a direct variation is y = kx where k is some number and the third one works for that also.