Unit 4 · Skill 4 of 4
○Not startedParallel & Perpendicular Lines
Identify slopes of parallel and perpendicular lines.
Watch the video
Start here (or skip if you already know it)
Visualize it
Explore it, then spot the correct graph
Practice problems
Answer 3 problems (80%+ correct)
Step 1: Watch
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Algebra 1 Review — Parallel & Perpendicular Lines
The Organic Chemistry Tutor · 2:12
Step 2: Visualize
Play with the interactive model to see how the math works, then test yourself by spotting the correct graph.
Move the controls and watch the math change — build a picture in your head before you solve.
The slope 1 tells you to go up 1 for every 1 step right. The y-intercept 2 is where the line crosses the y-axis, at the point (0, 2).
Step 3: Practice
Problem 1
Line A has slope 2. What slope is perpendicular to A?
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