# Question 28: air pressure in a bubble...? (1 Viewer)

#### danielle93

##### New Member
Does anyone remember what they wrote for "write an equation relating P, V and A, where A is a constant"

I think mine was like P=V x A

And i used it to find A = 1.5

Does anyone know if this was right? What did you guys have?

P = a/v,

and A = 1.5

#### jessxxxr

##### Member
yayyyyyyy i got that too

#### 2011_

##### Member
mine was P= a / v also. They just tried to trick people by saying a rather than k.

M

#### MichelleV

##### Guest
I got P=a/v as well.

It was divided because it varied inversely, not directly. A lot of people at my school skipped the inverse chapters in class and assumed it was direct variation :/

#### 2011_

##### Member
I don't remember what I wrote, but I think I would have got 6, and used almost identical working to MichelleV.

#### WorryWartCob

##### Member
I don't remember what I wrote, but I think I would have got 6, and used almost identical working to MichelleV.
That was my working but yeh <3

#### 2011_

##### Member
That was my working but yeh <3
Sorry! I'm obviously over tired, can't even read!!

#### Elliee

##### Crazy Kid
ok good I got A = 6!

yeah it was 6

faark

#### sheeshkaba

##### New Member
Thank God.
I got P=a/v
A=6.
I was seriously stressing about that question.

#### WorryWartCob

##### Member
Thank God.
I got P=a/v
A=6.
I was seriously stressing about that question.

but then P = 1.5

M

#### MichelleV

##### Guest
but then P = 1.5
Yes, P was meant to equal 1.5 in that question.
You still needed to find A=6 though as your constant for both that question and the next part