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.
The most welcoming colors for the front doors at the moment are turquoise, blue, red and dark red and all hues of brown from light brown to dark chocolate. So you can never get wrong if you paint your front door in your favorite color and give your house extravagant look. Source. Source.