The V-I characteristic for a solar cell is drawn in the fourth quadrant of the coordinate axes because it does not draw current but instead supplies current to the load. On the V-I graph, the point where the current is zero (x-intercept, Point A) represents the open-circuit voltage ($V_{oc}$). The point where the voltage is zero (y-intercept, Point B) represents the short-circuit current ($I_{sc}$).