Question

question 6 of 10
how do you know if two line segments are parallel?
a. their slopes are equal.
b. their slopes are reciprocals.
c. their slopes are negative reciprocals.
d. the slope of one is the negative of the slope of the other

Explanation:

In coordinate - geometry, two non - vertical line segments are parallel if and only if their slopes are equal. Reciprocals of slopes indicate a different relationship (not parallelism), negative reciprocals mean the lines are perpendicular, and one slope being the negative of the other does not imply parallelism.

Answer:

A. Their slopes are equal.