About this 3D model

This is Day 14 of my collection of printable equations. To see the whole collection, go to: http://www.thingiverse.com/thing:227210 Continuing with the polynomials, today is a parabola, y = a*x^2. Details: - units are in mm - Range(x) = -50 to 50 - a = 1/25 As always, I'm going to continue to post one equation per day until get bored or people lose interest. If there's a particular equation you'd like to see, leave a comment and I'll give it a shot.