Which of the following best describes the graph It is the gr
     Which of the following best describes the graph?  It is the graph of a parabola.  It is the graph of a function and it is one-to-one.  It is the graph of a function and it is not one-to-one.  It is not the graph of a function. 
  
  Solution
C). it is a graph of a function and it is one -one
as you can see some of x values are not plotted with y value

