Exercises: Parallel and Perpendicular Lines

Read each slope first -- directly from slope-intercept form, or with the $-\frac{A}{B}$ shortcut from standard form -- then compare.

Grade 10·17 problems·~30 min·Digital SAT Math·topic·sat-alg-lin2-parperp

Work through problems with immediate feedback

Warm-Up: Review What You Know

These review slope comparison.

Two distinct non-vertical lines are parallel when their slopes are:

Negative reciprocals of one another, so their product is $-1$ .

Equal to each other.

Opposite in sign but equal in absolute value.

Both equal to zero, since parallel lines cannot rise.