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*Blue, image, This picture above shows us a Y Intercept of 1 and a slope…
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Aly Sadek: Concept 4
How to write the equation of a line? When you write the equation of a line you need to find out two things out of a graph, firstly the slope or gradient and you can use two methods to do that the rise over run method or the more complicated method and when you get that all you do is put that instead of m before X and then lastly you have to get the Y Intercept and that is just the point where the line passes your Y Axis and if it is negative replace the addition sign with a subtraction sign.
The line of the equation is y=mx+b, m stands for slope or the gradient while b stands for y intercept. Once you find the m and the y intercept you calculate the formula based on the given points on the graph.
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Yassin Moussa: Concept 3
How do you use y=mx+b? In an equation, m is referred to as the slope, & B is referred to as the y-intercept, meaning the point on a graph which crosses the y-axis.
For example: 
We know that m is the slope, which means in this equation, the slope would be -3. We then know the number after the x is the y-intercept, making the y-intercept -46!
Now that we know how to find the slope & y-intercept of an equation, how do we use y=mx+b when we are given coordinates on a graph? Find out in the next branch!
First, take a look at the graph and locate the y-intercept: . As you can see the y-intercept is 4, so our equation so far is y= 4. Look at the next branch in order to learn how to find the slope to complete the equation.
In order to find the slope, locate the first 2 lattice points closest to the y-intercept, in this case the slope is 2/1, or 2. Then put both the y-intercept you found as well as the slope into formula. The final formula would be y= 2x +4!
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Omar El Odessy:Concept 1
Graphing a line on a graph requires two points which you can then connect with a straight line, and from there you can see your slope. When you graph a line you need two points with a X and Y coordinate each you then plot those points you connect them with a straight line and then you have graphed your first line.
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Hassan Said: Concept 2
In order to find the slope of a line you must find ordered pairs points that both have an x and y value. Then subtract the first value of y by the second value of y to get the numerator for the slope, and subtract the first x value by the second x value top get the denominator of your slope.
Let's say we have the coordinates (5,3)(2,4) you take the difference of the first and second y and put that as your numerator. Then take the difference of the first and second x and put it as your denmirator. So for these coordinate pairs you would subtract 3 by 4 to get -1 as your numerator and then subtract 5 by 2 to get your denmorator of 3. So the slope is -1/3.
Two methods and
Another way to find the slope is using a method called rise rise over run or rise/run which is explained here
This photo shows for example the two points 0,4 and 2,8 so if you are given these points and are asked to graph them all you have to do is plot them like they did and then just draw a line conecting them
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This picture above shows us a Y Intercept of 1 and a slope of 2 so the equation would regularly be y=2x+1 and we can see that is correct by looking at the corner of that image.
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