For this case we have that by definition, the point-slope equation of a line is given by:

Where:
m: It's the slope
 It is a point through which the line passes
 It is a point through which the line passes
According to the statement data we have:

Substituting we have:

By law of signs of multiplication we have to:

Answer:
The requested equation is: 
 
        
             
        
        
        
It is a constant. hope this helps
        
             
        
        
        
so you take the average of the x coordinates and the average of the y coordinates to get the midpoint like this
 
        
             
        
        
        
Answer:
   = -3
Step-by-step explanation:
Find 2 points
(-2, 4) and (1,-5)
We can use the slope formula
m = (y2-y1)/(x2-x1)
     = (-5-4)/(1 - -2)
     = -9/(1+2)
     = -9/3
   = -3