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