Equations of parallel & perpendicular lines (K-A)

Parallel lines from equation (example 2) (K-A)

Parallel lines from equation (example 3) (K-A)

Parallel lines from equation (K-A)

Perpendicular lines from equation (K-A)

Proof: parallel lines have the same slope (K-A)

Proof: perpendicular lines have negative reciprocal slope (K-A)

Writing equations of perpendicular lines (example 2) (K-A)

Writing equations of perpendicular lines (K-A)