m = slope = \(\frac{y_2-y_1}{x_2-x_1}\,=\,\frac{-2-1}{-3-0}\,=\,\frac{-3}{-3}\,=\,1\)
Using the point (0, 1), the equation in point-slope form is
y - 1 = 1(x - 0) Simplify
y - 1 = x Add 1 to both sides.
y = x + 1 This is the equation in y = mx + b form.