IGCSE Maths / Graphs of straight lines

Equation of a line through two points

Edexcel International GCSE Maths (4MA1), chapter 6: Graphs of straight lines, specification point 3.3f. Part of the full course.

Read the revision notes · IGCSE Maths past papers

Use two points to find the gradient, then substitute one point into y = mx + c to find c. This gives the equation of the line in the form y = mx + c.

More lessons in Graphs of straight lines

• Coordinates in all four quadrants
• The midpoint of a line segment
• Drawing a straight line from a table of values
• y = mx + c and the shape of the line
• Gradient from two points
• Parallel lines
• Perpendicular lines