What must be true about the slopes of two perpendicular lines, neither of which is vertical?
(1 point)
Responses
The slopes are equal.
The slopes are equal.
The slopes have product 1.
The slopes have product 1.
The slopes have product negative 1.
The slopes have product Image with alt text: negative 1 .
One of the slopes must be 0.
1 answer
The slopes have product negative 1.
1 answer