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Paper 1 & 2
Linear Graphs
Foundation
Read gradient from the rise over run.
Key Facts
- Use y = mx + c to identify gradient and intercept.
- Graphs show relationships between variables.
Topics Covered
Gradient & Intercept
What you need to know
- •Gradient = rise/run.
- •y-intercept is where x = 0.
Exam Tips
- Plot 2 points and draw a straight line.
Reading Graphs
What you need to know
- •Read coordinates accurately.
- •Use the axes labels for units.
Exam Tips
- Draw guidelines from the point to the axes.
Key Terms
Gradient
How steep a line is.
Intercept
Where a line crosses an axis.
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Common Exam Questions
Find the gradient of line through (1, 3) and (5, 11).
2 markseasyPaper 2
Model Answer
2
What examiners want to see
- ✓Use (y2 - y1)/(x2 - x1).
Find the equation of the line with gradient 4 and intercept -2.
2 markseasyPaper 1
Model Answer
y = 4x - 2
What examiners want to see
- ✓Use y = mx + c.
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