Question

select the answer that best completes the given statement. the product of the slopes of two non - vertical perpendicular lines is - 1. 1. undefined. 0.

Explanation:

Step1: Recall slope - perpendicular lines property

In coordinate geometry, if the slope of one non - vertical line is $m_1$ and the slope of a perpendicular non - vertical line is $m_2$, then $m_1\times m_2=- 1$. This is a fundamental property of perpendicular lines in the coordinate plane.

Answer:

• 1.