This piecewise graph is composed by:
- y= (x + 2)^2 ( x greater and equal 2 )
- y= -3x +2 ( y greater and equal 2 )
- y= sqrt( -x^2 + 4) ( x between and equal 0 and 2 )
- x greater and equal 2
- x less and equal 0
- x between and equal 0 and