Using algebra to find the point of intersection of two lines

Explore Using algebra to find the point of intersection of two lines.

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Te reo Māori terms

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Learning objective overview

Master Teaching Guide coverage for this objective.

Resources

Terminology

  • Point of intersection
  • Simultaneous equations
  • Linear equation
  • y = mx + c
  • Gradient
  • Coefficient
  • Intersection coordinates
  • Equate
  • Substitution method
  • Solving systems
  • x-coordinate
  • y-coordinate

Task goals

  • Find the point of intersection of two straight lines by equating their equations and solving for the coordinates.
  • Set two line equations equal ($y = mx + c$ form) and solve to find the x-coordinate, then substitute to find the y-coordinate.
  • Work with lines given in different forms (e.g., $y = mx + c$ and $ax + by = c$) and rearrange to a solvable system.
  • Verify that a point lies on both line equations to check the intersection is correct.
  • Apply intersection-finding to solve problems involving two linear relationships.

Key skills

  • Algebraic intersection
  • Simultaneous equations
  • Substitution method
  • Elimination method
  • Intersection of lines
  • Linear graphs

Quick stats

  • 81 total questions
  • 3 difficulty levels
  • Answers included