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.
Dreaming of a red door refers to either anger or passion that you are keeping locked up within yourself. If you open the red door, then it means that you are confronting some uncomfortable emotions. To see a black door in your dream symbolizes your personal hidden secrets. If you open the black door, then it suggests that you are exposing yourself to danger. You are proceeding toward a situation despite the risk. Seeing a gray door in your dream indicates that you are experiencing ambiguity in your future.