Algebra 1 · Linear Functions
Parallel Lines
Algebra 1 · Linear Functions
Definition
Parallel lines are lines in the same plane that never meet because they have equal slopes.
Teach it
Where it is taught, with guided notes, practice, homework, an exit ticket and an interactive Teacher Deck.
Examples
- y = 2x + 1 and y = 2x − 3 are parallel.
- Both have slope 2.
Key rule
Parallel lines share the same slope but different y-intercepts.
Memory hook
Parallel = same slope, never cross.