Answer:
True
Step-by-step explanation:
We can prove this by modeling the slope of a line as x, and since perpendicular lines have the opposite reciprocal slope of the first line, its slope will be [tex]\frac{-1}{x}[/tex].
From here, you multiply the two slopes together, which is [tex]\frac{x}{1}*\frac{-1}{x}[/tex]. Simplifying this expression gives [tex]\frac{-x}{x}[/tex], which is equal to -1 when you cancel out x.
