You need to tell how many percent you will discount and then find the new price
        
             
        
        
        
Answer:
you do a line that goes through b but doesn't go through the circle
 
        
             
        
        
        
A quadratic function is a function of the form 

. The 
vertex, 

 of a quadratic function is determined by the formula: 

 and 

; where 

 is the 
x-coordinate of the vertex and 

 is the 
y-coordinate of the vertex. The value of 

 determines if the <span>
parabola opens upward or downward; if</span>

 is positive, the parabola<span> opens upward and the vertex is the 
minimum value, but if </span>

 is negative <span>the graph opens downward and the vertex is the 
maximum value. Since the quadratic function only has one vertex, it </span><span>could not contain both a minimum vertex and a maximum vertex at the same time.</span>
 
        
        
        
-x^2 + 7 is the simplified expression