# In the x-y plane, the straight lines L1 and L2 cut the x-axis at point A and point C respectively. If B is the point of intersection of L1 and L2, Is

In the x-y plane, the straight lines L1 and L2 cut the x-axis at point A and point C respectively. If B is the point of intersection of L1 and L2, Is the slope of AB positive?

(1) The angle which the line BC makes with the positive direction of x-axis is greater than 60 degrees and less than 90 degrees.

(2) Angle CBA = 40 degree.

I got E as the the answer, what is the OA ?