The given equation is
which has
Thus, the graph cuts the y-axis at b = 4, and goes down by 1.5 units for every one-unit increase in x (since the slope is negative). Thus, when it reaches x = 2, y has decreased by twice 1.5; that is by 3, giving y = 4 &minus 3 = 1. This gives a second convenient point to plot: (2, 1).
