Problem solving with parallel and perpendicular lines

Explore changing the values of m and c in the equations y=mx + c for each of the four lines. What stays the same and what changes? Can you make your four lines enclose the following quadrilaterals
  • square, rectangle, parallelogram, kite, rhombus, isosceles trapezium
Set the red line to y=2x+4 and now recreate the shapes above just changing the other three lines