Module 2: Lesson 2

 

Are You Ready?

1. 
   
   2. To determine the x-intercepts, let y = 0.
      
      
       
      
      
      

      The x-intercepts are −4 and 4.
      
      

      To determine the y-intercepts, let x = 0.
      
      

       

      
      
      

      The y-intercept is 16.
      
      

      Using the form y = a(x − p)2 + q, you know that the vertex is (p, q).
      
      When looking at y = −x2 + 16, the vertex is (0, 16). The a value is negative, so the parabola opens down and there is a maximum value of 16.

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