Slope-Intercept Form
y = mx + b
- m is slope (rise/run).
- b is the y-intercept (where x = 0).
- Positive slope goes up to the right; negative goes down.
Core Concepts
What every 8th grader needs to master
Point-Slope Form
y - y₁ = m(x - x₁)
- Use it when you know one point and the slope.
- Substitute values for m, x₁, and y₁.
- Simplify to slope-intercept form to graph quickly.
Graphing Lines Fast
- Plot the y-intercept first at (0, b).
- Use slope as rise/run to get another point.
- Draw a straight line through both points.
Interactive Tool
Graph Lab
Enter a slope and y-intercept to see the graph update instantly.
Draw from y = mx + b
Equation: y = 2x + 1
Convert point-slope to slope-intercept
Result: y = 3x + 1
Coordinate Plane
Practice Arena
Teach. Practice. Check.
Select a skill
Answer correctly to build stars. Five stars = Rockstar in that skill.
- Correct
- 0
- Attempts
- 0
- Streak
- 0
Current Skill: y = mx + b
Press New Question to begin.
Rockstar Sprint
Five mixed questions. Two-minute timer. Beat your best score.
Sprint not started.