Question

if two lines are parallel, describe the relationship between their slopes. choose the correct answer below. a. if two nonvertical lines are parallel, then the sum of the slopes of the two lines is 0. b. if two nonvertical lines are parallel, then the product of the slopes of the two lines is 1. c. if two nonvertical lines are parallel, then they have the same slope. d. if two nonvertical lines are parallel, then the product of the slopes of the two lines is -1.

Explanation:

Parallel nonvertical lines have identical steepness, meaning their slopes are equal. Option A refers to slopes that are negatives of each other (perpendicular in a different context), Option B is not a standard line relationship, and Option D describes perpendicular lines.

Answer:

C. If two nonvertical lines are parallel, then they have the same slope.