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.
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.