GCSE revision notes

Horizontal Lines

The equation means that the y-coordinate is always 2. This means that it is a horizontal line passing through the coordinate

The graph below shows a couple of examples of horizontal lines graphically

Vertical Lines

The equation means that the x-coordinate is always 2. This means that it is a vertical line passing through the coordinate

The graph below shows a couple of examples of vertical lines graphically

KEY SUMMARY:

· Equations of the form are vertical lines

· Equations of the form are horizontal lines

An example of a geometrical reflection

These two shapes are REFLECTIONS in the line

They are MIRROR IMAGES

Each corresponding point is the same distance from the mirror line