The total amount is 0.75 inches or 3/4 inches.
        
             
        
        
        
A coefficient is a number that is attached to a term.
For example:
3x² - 5x + 6 = 0                 
The coefficient of x² is 3.
The coefficient of x = -5. 
Hope this explains it.
        
             
        
        
        
Rise over run is 7 over 2 so 7/2 is the slope
        
                    
             
        
        
        
The nearest whole number would be 18 because the 6 is greater than 5. Anything greater than five, would most likely be rounded to the nearest whole number. Hope this helped!