a number plane or cartesian graph consists of two number lines at right angles called the x-axis and the y-axis.

position on the number plane is fixed by a pair of coordinates (x, y)

latitude and longtitude are coordinates on the surface of the earth.

Key Skills

  • locate a point on a number plane given its coordinates
  • give the coordinates of a point on a number plane
  • understand the latitude and longtitude system


cartesian graphaxiscoordinates, x-axis, y-axis, origin.