A, according to the image, the resistance of the bulb is equal to R=UI, which is equal to the reciprocal of the slope of the straight line connecting the point on the graph with the origin O. According to the mathematical knowledge, the resistance of the bulb increases with the increase of voltage and the decrease of this slope, so A is correct;

B and C As can be seen from the figure, the voltage at point P is U 1 and the current is I2, so the resistance of the bulb R=U 1I2≠U 1I2? I 1, so b is correct and c is wrong;

D, because P=UI, the area enclosed by rectangular PQOM in the image is the actual power of the small bulb corresponding to point P, so D is correct.

So I chose ABD. ..