The general form for a linear equation in two dimensions is
y =
mx +
b, where
m is a
real constant representing
slope, and
b is a
real constant representing the
y-intercept.
Expressed in point-slope form, a linear equation in two dimensions may be written as y - y1 = m(x - x1), where m is again the slope of the line, and (x1, y1) is a point in the line.