The sequence seems to be that you add 1 and then multiply by 2, and then add 1 and multiply by 3, so I would assume you do 9 + 1 = 10, and then multiply by 4 to get 40 as your next number. I hope this helps!
        
             
        
        
        
The difference quotient for the function f(x) is 
Given :
Difference quotient formula 

Given function 
find the difference quotient using the formula 
first we find out f(x+h) using given f(x)
replace x with x+h

Now replace it in our formula and also replace f(x)

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B. 2
1 is way too big, 4 is way too small, 3 is clearly less than a fourth of the pie chart, so it must be 2.