Linear Graphs
y = mx + c: m is the steepness, c is where it crosses the y-axis.
CoordinatesPlotting linesGradientParallel linesy = mx + cQuadratic graphs
📖 Learn
Gradient m
Up ÷ across. Positive slopes up, negative slopes down.
Intercept c
Where the line crosses the y-axis (x = 0).
Parallel
Parallel lines have the same gradient.
Worked example
Gradient & intercept of y = 3x − 2
- 1Compare with y = mx + c
- 2m = 3
- 3c = −2 ✅
🧪 Play with it: Line & grid
y = 1x + 0
Tap the grid to see a point's coordinates.
⭐ Practise
π
Ask Professor Pi
Type a question or say where you're stuck. You'll get hints, not just answers!
AI-powered tutor — it can make mistakes, so check with your teacher if unsure.