In your notes:
Check Your Answer
Characteristics
Examples
y = 2x - 4
y = 2x + 8
Non-Examples
y = 3x - 4
My Definition
Lines that have the same slope and never intersect.
y = 5x - 3
y = -(1/5)x + 7
y = 5x - 4
y = (1/5)x + 7
Lines that intersect at right angles.