Question

Suppose y varies directly with x. Write an equation relating x and y.
y=12 when x=4 ..

Answer 1

When y directly varies with x then it simply means that:

\[y = k \cdot x\]

Where, \(k\) is the proportionality constant..

Answer 2

Now, find k when you are given with x = 4 and y = 12..

Can you find k here??

Answer 3

wait what ? o.O

Answer 4

So, you have:

\(y = k \cdot x\)

Now plug in here y = 12 and x = 4, and find \(k\) here.

Answer 5

a.
y = 3x
c.
y = 4x
b.
y = x
d.
y = − 3x
so where does 3 come in on these answers ?

Answer 6

Find \(k\) there and you will know 3 came there.

Answer 7

*how.

Answer 8

how do you find k tho? im sorry im a slow learner .....

Answer 9

Okay let us go slow then..

Did you get this:

\[y = kx\] ??

Answer 10

no ..

Answer 11

When we say two quantities are directly proportional or like x varies directly with y, then it means:

\[x = k \times y\]

But in our case it is given that , y varies directly with x, then you will have:
\[y = k \times x\]

Now getting?

Answer 12

kind of

Answer 13

Make it sure first.

Answer 14

i really dont get it i dont get anything and
my time for my test is almost up ima just guess thnks for trying :) ..

Answer 15

Giving test??

Oh sorry, then I can't help you more..

But when you will actually want to learn, then do mention me in your posts..

You are welcome dear..

Answer 16

oh trust me i wont ha

Answer 17

Good for you.. :)