If you are trying to find the slope using only these two points then you should first take note of what your X and Y values are. For instance, 12 & 11 are your X values and -18 & 12 are your Y values. Knowing this you can now find your slope by doing y2-y1/ 
x2-x1. You will get the fraction -30/1 or -30 which is your slope. Hope that made sense!
        
             
        
        
        
Its B because 3/10ths is a little bit more than 0.35, but way less than 0.41
        
                    
             
        
        
        
Try graphing them in desmos
        
             
        
        
        
Answer:
Th answer is C u got it right
Step-by-step explanation: