Shape of mass vs acceleration graph?

[noahsdev]

So I know the shape but I forgot what its called. This is what it looks like but what is it called :L, I can't remember.
http://antonine-education.co.uk/Image_library/GCSE/Newton_II.GIF

 

[milesyoung]

A hyperbola:
http://en.wikipedia.org/wiki/Hyperbola

 

[noahsdev]

Yes! that's the one thankyou :)