Answer:
They are any number in front of a variable so like 4x 7y or 8z. 4, 7 and 8 are the coefficients. A number by itself is a constant. For example 3, 1 and 9 are constants.
 
        
                    
             
        
        
        
 the answer is Probably C.
        
             
        
        
        
ANSWER
See below
EXPLANATION
Part a)
The given function is 

From the graph, we can observe that, the absolute maximum occurs at (-0.7746,6.1859) and the absolute minimum occurs at (0.7746,5.8141).
b) Using calculus, we find the first derivative of the given function.

At turning point f'(x)=0.

This implies that,



We plug this values into the original function to obtain the y-values of the turning points

We now use the second derivative test to determine the absolute maximum minimum on the interval [-1,1]


Hence 

is a maximum point.

Hence 

is a minimum point.

Hence (0,-6) is a point of inflexion