Question

PLEASE help. I need it so badly.
http://gyazo.com/87e85eabe68b061f2e7e5c35cd44d31f

Answer 1

I'm not sure how to check the variations, though? I don't know what to do on it. Really sorry, this is the most confusing thing for me.

Answer 2

Find the quotients, y/x for the values of the table.

Answer 3

Uh, how?

Answer 4

For example, the first pair of values,
\[y/x=6.4/4=1.6\]
the second pair of values,
\[y/x=11.2/7=1.6\]
and so on.
So you demonstrate that the quotient y/x is constant, and the constant is 1.6.

Answer 5

Okay...

Answer 6

Do you fully understand it?

Answer 7

Somewhat.

Answer 8

How would I make the equation?

Answer 9

The idea is that if y varies directly with x, then the following law must be true,
\[y=kx\]
Now you must find k. You begin supposing y varies directly with x, so if this is true then it must be true the following statemen,
\[\frac{y}{x}=k\]
Then only step you need now is verify that for each pair (x,y) the quotient y/x gives a constant.

Answer 10

Okay.

Answer 11

I think I got it, thanks!

Answer 12

;)

Answer 13

Thanks a ton.