Question 2: peaceful protests without violence
        
             
        
        
        
D = P - 2.50
D is price after coupon is used, P is price before
 
        
             
        
        
        
The center of the circle is expressed as (h,k) in the standard form  of equation. In this case, the diameter endpoints are <span>(-3, 8) and (7, 4). Hence the circle center has coordinates which are the midpoints of the two points. 
x = (-3 + 7) /2  = 2
y = (8 + 4) /2 = 6 
hence the center of the circle is (2,6)</span>
        
             
        
        
        
I can't see the whole diagram.. Can u fix the picture