Answer:
5.25
Step-by-step explanation:
Take the distance between the two points and divide by 2. 
The distance between the two is 10.5 (9.1-(-1.4))
Divide by two to find the midpoint. 
 
        
                    
             
        
        
        
Answer:
M=3
Step-by-step explanation:
Use the slope formula
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The volume of a pyramid with known base area and height is 1/3 of the volume of a box with those same dimensions. So

 
        
             
        
        
        
Range: (-infinity, 4] 
the ] signifies that the four is included in the range, rather than ) which means reaching but never approaching. this is why we use ( ) for - and + infinity, cause it can never be reached.
minimum: (-infinity, infinity)
keep it in same format as you have for the maximum
increasing
the interval -infinity
        
             
        
        
        
It must be ≤ instead of ≥.
y ≤ - 3·x + 4