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 Description  
 Collinear:  Points are collinear if they lie on the same straight line.
In the picture below, collinear points are

  • Points A, D, and C (blue line)
  • Points A and B (black line)
  • Points B and D (red line)
  • Points B and C (green line)




In addition, points that are collinear must satisfy the same linear equation. So without even looking at a graph, if we are given the linear equation y = 4x - 2, we know that the points (2,6) and (0,-2) are collinear because 6 = 4*2 - 2 and -2 = 4*0 - 2.