The equation for a circle is ( x - h )^2 + ( y - k )^2 = r^2. Now, this equation may look like it would take an eternity to understand, but it's very simple. H and K in the equation stand for the point in the middle of the circle. See this picture? H and K are the coordinates for the middle of the circle. R stands for the radius and ^2 stands for the second power. With this equation, you can graph a circle on a graph with no problem! :D This shows that you can create shapes by using an equation. ...
Math
Slope Intercept Form
The Slope-Intercept Form is the definition of what a line is. The equation for the slope-intercept form is y=mx+b. This may look confusing, but it's very easy to understand. M stands for the slope, which you should know about if you read my article on slopes, check that out if you didn't :D. B stands for when the line crosses the y axis. Look at this picture! Do you see how the point b is touching the y axis? That is the b in the equation y=mx+b. Now, let's move on to an example. For this first question, scroll down! What is the answer to this equation? Let's see. Since the equation for a slope is y=mx+b and m equal the slope, let's find the slope of this first. I'm going to choose 1,2 and 5,4. Now that I have my points, let's subtract. 4-2/5-1= 1/2. Now that we know 1/2 is the slope, let's plug it in our equation. ...
Slope
A slope of a line is the steepness of the line. Slope is usually calculated as rise over run, the change of y divided by x. The equation for the slope is y2-y1/x2-x1. For example, if you had a line and wanted to calculate it's slope, you would get any 2 points from the line. Look at this graph here! I can choose 2,5 and 5,7 if I wanted. I can also choose 1,4 and 6,8. Any 2 points are fine, as long as they touch the line. After, you get the 2 coordinate points and subtract their y parts. I'm going to use 2,5 and 5,7 so I would get the second point's y axis, which is 7. Remember: When I mean the ...