College Algebra / Unit 3 Alg 150 short lesson, about 20 seconds
Parallel Lines
Captions available
The idea
Parallel lines have equal slopes and different y-intercepts; equal steepness with no shared point keeps them apart forever.
In practice
y = 2x + 1 and y = 2x − 4 both climb at slope 2, always 5 apart vertically — they never meet.
Where people slip
Same slope and same intercept is one line, not two.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
Unlocks
- Nothing yet depends on this.
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