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.
Is there a history/meaning to a red front door? We see that a lot of old (and new) houses at least currently have red front doors, even if there is no other red trim on the house. Other than it's supposedly a good thing according to the rules of Feng Shui, is there any other symbolism or history to red front doors?