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!
Orange Door Meanings. Orange is a colour associated with Mercury, which is the swiftest of the planets. Indeed the planet as the fleet-footed Roman god is symbolic of for reception, communication, perception, commerce, movement, intelligence and flexibility. With these kind of qualities, it might be a good idea to paint your business door orange.
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.