Slope-Intercept Form

Write and interpret y = mx + b.

1️⃣

Watch the video

Start here (or skip if you already know it)

2️⃣

Visualize it

Explore it, then spot the correct graph

3️⃣

Practice problems

Answer 3 problems (80%+ correct)

Step 1: Watch

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Basic Linear Functions — y = mx + b

Math Antics · 13:23

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.

y = 1x + 2

Slope (m)1y-intercept (b)2

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).

Answer 3 problems with at least 80% correct to complete this skill.

Problem 1

Write the equation of a line with slope 3 and y-intercept −2.

Tip: press 1–4 to pick an answer.

Press Enter to check

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