If you graph a linear function, you get a line. If you graph a quadratic function, you get something called a parabola. A parabola tends to look like a smile or a frown, depending on the function. Check out this tutorial and learn about parabolas!
Green Door Meanings. Green bursts with images of spring, and so green is symbolic of renewal, growth, rejuvenation and transformation. Green is associated with the earth, and can provide grounding energies. Green is also used in holistic healing practices because it promotes physical well-being as well as compassion.
I personally like homes that use three paint colors. Usually one color is used for the exterior sides of the house, the second color is for the trim, and a third color accents the architecture, shutters, or some other detail. If a fourth color is used, stick to just the front door.