Determine whether the line through each pair of points is parallel. A(1, -3), B(-1, -11) and C(1, 5), D(-1, -3).
A) parallel
B) not parallel

Name: Determine whether the line through each pair of points is parallel. A(1, -3), B(-1, -11) and C(1, 5), D(-1, -3). A) parallel B) not parallel
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Question

Quizplus · Accepted Answer

The slopes of both lines are equal. The slope of line AB is (-11 - (-3))/(-1 - 1) = -8/-2 = 4. The slope of line CD is (-3 - 5)/(-1 - 1) = -8/-2 = 4. Since both slopes are equal, the lines are parallel.

Determine Whether the Line Through Each Pair of Points Is