Final answer:
To determine if AB is perpendicular to Có, we need to consider the slopes of AB and Có. If two lines are perpendicular, the product of their slopes is -1.
Step-by-step explanation:
To determine if AB is perpendicular to Có, we need to consider the slopes of AB and Có. If two lines are perpendicular, the product of their slopes is -1.
In option A, the slopes of AB and CD are not reciprocals of each other, so AB and Có are not perpendicular.
Therefore, the correct answer is D. No, because the slope of is is 4, and the slope of Co is -1/4.