In y=mx +b?
If so then -3=-2(3)+b
B=3
        
             
        
        
        
Answer:
4.5
Step-by-step explanation:
 
        
                    
             
        
        
        
The first one is 31.875 and the second is 12 I don't know how to explain to get it. Sorry
        
             
        
        
        
Answer:
y >  6x -100  
Step-by-step explanation:
the slope intercept equation of the line is 
y=mx+b
m is the slope = (y2-y1) / (x2-x1) so between the y-intercept (0,-100) and the given point (25, 50) we have m= -100-50/0-25 = -150/-25 = 6
y= 6x -100
now we have to figure the inequqlity part so take point (0, 0) that belongs to the solution and substitute in the equation
0 = 6*0 -100 
0 = -100  for the equation to be true we have to make it 0 > -100, we also need to make it NOT greater or equal then because the line is doted not solid  so the inequality is 
y >  6x -100