The characteristic of parallelogram is that two opposite sides are parallel, because point N is on the X axis and point A is also on the X axis, so if there is this parallelogram, it is DM // NA, so first find out the straight line AC-G (x) = AX+B, because AC crosses point C, so g(x)=ax+3, and because AC crosses point A, f(x

Because the two lines intersect with point D, the coordinate of point D is (1, 9/4).

If there are m points, -3x 2/4+3x = 9/4, so x 1= 1, x2=3, then m is (3,9/4), (the coordinates of n points are (2,0)).