Step-by-step explanation:

 
        
             
        
        
        
To stretch or shrink the graph in the y direction, multiply or divide the output by a constant. 2f (x) is stretched in the y direction by a factor of 2, and f (x) is shrunk in the y direction by a factor of 2 (or stretched by a factor of ). Here are the graphs of y = f (x), y = 2f (x), and y = x.
y is f(x) btw.
 
        
        
        
Density = mass / volume
Density = 8,200 grams / (4*4*4)
Density = 8,200 grams / 64 cubic inches
Density =
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128.125
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grams / cubic inch
        
             
        
        
        
( x-5 ) (x + 6 ) 
multiply 
X times X + 6x - 5x - 5 times 6 
connect like terms 
x squared + 6x - 5x - 30
Answer is 
x squared + x - 30