2.23 Equation of a Straight-Line Substitution GCSE PowerPoint Lesson

In this 18-slide lesson, students will learn how to find the equation of a straight line using substitution. They will use the gradient and a point the line passes through to calculate the y-intercept, c, and form the equation in the form y = mx + c. The lesson also covers how to find the gradient from two points and then use one of the points to work out the full equation.

The lesson includes:

• Clear, guided examples

• Discussion opportunities from Think, Pair, Share

• Mini whiteboard section to check understanding and clarify misconceptions

• Two structured tasks to practise key skills

• Challenge activity to extend and deepen learning

Perfect for engaging learners while reinforcing essential algebra concepts.