y = mx + b
m = Slope (how steep the line is)
b = the Y Intercept (where the line crosses the Y axis)\
How do you find “m” and “b“?
- b is easy: just see where the line crosses the Y axis.
- m (the Slope) needs some calculation. Remember we like to write slope like a fraction.
The fastest and easiest thing to find first when looking at a graph is the y-intercept (b).
Here we see that the line crosses the y-axis at positive 1.
So, b = 1 .
Now to find the slope (m) we will use rise over run:
- Rise is how far up
- Run is how far along
In this example the rise is 2 and the run is 1.
So, m = 2/1 .
Now that I know m = 2/1 and b = 1 I can plug them into the equation for slope intercept form y = mx + b.
y = (2/1) x + 1
^^^^^ This is the equation of the line.
For more information on y = mx + b click here.
Get your Slope Intercept on!