Not sure about this but, is it a line?
        
             
        
        
        
Answer:
31/5
Step-by-step explanation:
[f(4) - f(-1)] / 4-(-1)
 
        
             
        
        
        
Answer:
9/4
Step-by-step explanation:
The divide symbol is also the line that separates the numerator and the denominator, so 45÷20 can also be written as 45/20.
We can see that both 45 and 20 are divisible by 5, so we can simplify the fraction down to 9x5/4x5, and then we cancel out the 5s and are left with 9/4
 
        
             
        
        
        
The answer is -1 because when cross simplifying you get 0/2-2/0 which =-2/2 and that simplified is -1
The answer is -1
        
             
        
        
        
I think that the answer is quadratic