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.
2. Understand the dream meaning of a door. Doors are a symbol of transition. Dreaming about a door is suggestive that you are in need of change, or that you are currently undergoing a transition from one stage in your to another. Doors can lead to adventure, secrets, opportunities and new starts. It is a dream telling you to keep pushing that door open and to move on to the inevitability of change. 2  A person who does not want to change can be left stuck in the past and grieving for the person they once were. 3  A door that will not open is indicative of your unwillingness to transition.