Question

Find y when x=24
Y varies directly as x
When y=30, x=9.

Answer 1

7.2???

Answer 2

y varies directly with x

ie y=kx

Answer 3

Now when y=30 x=9

Answer 4

Substitute in equation and find k

Answer 5

Once you get k ,you are given x=24 .Find y .

Answer 6

So how would the equation look in order to find k?

Answer 7

30=k *9

Answer 8

Ok, i am at a lost on how to find k from that, i'm not just asking you to give me the answer i actually want to learn how to do solve this.

Answer 9

hmm your lost but you want the answer?

Answer 10

30= k X 9

k=30/9 .Was that really hard?

Answer 11

I hope you can do the rest by yourself.

Answer 12

So i got 3.33

Answer 13

y=kx
When y=30, x=9.
30=k *9
divide by 9 on both sides to isolate k
30/9 = k
3.333 = k
-----------------------------------
Find y when x=24
y = kx
y = 3.333 * 24
y = 80

Answer 14

basically what AravinG said :)

Answer 15

Oh wow that made it very simple, thank you very much. I'll go ahead and apply that to the original question :)

Answer 16

yes that is a great idea :)

any doubts or questions feel free to ask :)