Given the parabola whose equation is , find the focus and determine if the parabola opens up or down.
       
      
                
     
    
    
    
    
    1 answer:
            
              
              
                
                
The equation of a parabola is:

If a>0, then the parabola opens up;
If a<0, then the parabola opens down.
The coordinates of focus are:
 
 
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