The formula to find the area  for any circle is radius square times Pi. If you had a circle with the radius of 3 feet, then that process is simple. Since the formula states that you have to take the radius and multiply it by two. So you simply take 3 and turn it into a fraction; 3/1.  The equivalent fraction of Pi is 22/7 , so you would multiply 3/1 by 22/7, and most likely get 9  and 3/7 as an answer. However, that answer would be approximate, simply because Pi goes on forever. The formula for the circumference is 2 • π • radius   =   π • diameter. To simplify it, there are several lines that can reach across the paper. For starters, there is the circumference, radius, and diameter. The circumference of a circle is the actual length around the circle which is equal to 360°. Pi (p) is the number needed to compute the circumference of the circle. In circles the circumference is 3.14 (p) times the Diameter.
    In all honesty, some of us might have been confused while trying to memorize all of the formulas. The circle is one of the most complex types of shapes there are. With no vertex, or corners, finding the center might be a challenge sometimes, especially for finding the circumference, or area of a circle. Often, the measurements are given, so you wouldn't exactly need to worry about that as much. Just plugging in the information for completing the formula can be a bit stressing at times. Sometimes, you might forget your place on the mathematical equation. Memorizing formulas, blending with the norm of arithmetic isn't easy, I will not lie.

An infamous number that is well known world wide, is pi. The reason being, is merely the fact that pi is a very unique number. Pi continues to go on forever, but never repeats a number, or has any significance in number patterns. Some people had a great talent in memorizing the most numbers from pi as possible. Others don't care much for the number at all. Pi's equivalent fraction is 22/7, simply because if you take 22, and divide it by 7, then you have pi. Pi is an irrational number, because it isn't a terminal(stops at one point), and it doesn't repeat the same numbers. Sometimes instead of using Pi itself, most prefer to use the fraction instead.
     . Starting around the 15th century, new algorithms based on infinite series revolutionized the computation of π, and were used by mathematicians including Madhava of Sangamagrama, Isaac Newton, Leonhard Euler, Carl Friedrich Gauss, and Srinivas Ramanujan. In the 20th and 21st centuries, mathematicians and computer scientists discovered new approaches that – when combined with increasing computational power – extended the decimal representation of π to, as of late 2011, over 10 trillion (1013) digits. Scientific applications generally require no more than 40 digits of π, so the primary motivation for these computations is the human desire to break records, but the extensive calculations involved have been used to test supercomputers and high-precision multiplication algorithms.

Once you come up with your final equation, you are one step closer to finishing your graph. Now, all you need to do is figure out how to graph the equation. Well, if you look at the line equation mx+b=y, then you have to plug the numbers in. The b in your equation would be your y intercept, and you can put that on the line first since that is where the y axis and your point meet. Then you have your m, or your slope. If you think about what the slope is, its basically your change in your y over your change in your x, or can be portrayed as the rise over the run. From the y intercept, you would count the rise, or your y, however many spaces up or down depending if its negative or not. Then you take your the run which is the change in your x, and move it up left and right however many spaces.
    From there on out, you can continue to go however many spaces up, down, left, or right in whichever direction the slope directs it to go in. The denotation of a line is; any two or more points that go in one direction forever. There is no end to it, and that's will correspond to the equation of your line. So first, plot the y intercept, then use your rise over run method, or the equation, y2-y1, over x2-x1.