So I belive you would divide 8 by 30 then subtract 8 :)
        
                    
             
        
        
        
B
given f(x) in factored form, equate to zero for x-intercepts
(x - 8)(x - 4) = 0, hence
x = 4, x = 8 ← x- intercepts
The vertex lies on the axis of symmetry which is situated at the midpoint of the x- intercepts
x- coordinate of vertex =  = 6
 = 6
f(6) = (6 - 8 )(6 - 4 ) = -2 × 2 = - 4 ← y-coordinate
vertex = (6, - 4 ) → B
 
        
             
        
        
        
Answer: Slope: -1    Y-intercept: -4
Step-by-step explanation:
Slope formula: 

 
  
 
 
m = -1
When you draw this on the graph, the y-intercept is -4.
y = -4
 
        
                    
             
        
        
        
You list the multiples of both numbers and see which number they share that is on each table
For example,
3,6,9,(12),15,18,21,(24)
4,8,(12),16,20,(24)
12 is the least common multiple of the numbers 3 and 4