y = mx + b
y = ycoordinate for a point on the line.
x = xcoordinate for the same point on a line
m = slope
b = yintecept ...where the line crosses the vertical axis
For the example graph above, the equation is
It would be tempting to look at the graph and call the yintercept 2. The problem with this interpretation is the fact that the graph’s horizontal numbers do not start at zero. Therefore the axis at the left is not the yaxis. The yaxis is where x = 0.
