[nabs-l] Question on a Braille sign in Calculus

[Miso Kwak]

Hello, I am currently studying basic calculus as a part of trig/precalc 
class curriculum.

I do not own Nemeth guide in an accessible formant neither I have 
calculus textbook formally brailled. (The teacher just uses worksheets 
which are brailled by but I don't think all nemeth code is correctly 
used)
In calculus there is a thing we read as "y prime". How would I write 
that in Braille?
I would appreciate your help.
Miso