Students learn how to plot and find the equation of horizontal and vertical straight line graphs. As learning progresses students consider the coordinate pairs of where a horizontal and vertical line would intersect.

The start of the lesson is use to recap solving geometry problems with coordinates in the first quadrant. The plenary challenges students to consider the horizontal and vertical lines that form to make a square.

**Differentiated Learning Objectives**

- All students should be able to write the equation of a horizontal or vertical straight line graph.
- Most students should be able to recognise, sketch and produce horizontal and vertical graphs using equations in x and y and the Cartesian plane.
- Some students should be able to link horizontal and vertical straight line graphs to perimeter and area.