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.
Although painting your entire exterior would be a big to-do, giving just your door a new look is a doable DIY -- and it packs a lot of punch. We've chosen six paint colors for front doors that will give your house some major curb appeal. 1  1. Red: You can't go wrong with a classic fire engine shade, and this bold hue looks great with homes clad in white, blue and grey.