Answer:
44.55 
Step-by-step explanation:
I actually didn't get the right answer and I just edited it right now I'm sorry I dont have an explanation! 
 
        
             
        
        
        
It's just asking for the gradient basically
150/3 = 50
Or technically -50 because it's decreasing
        
             
        
        
        
Answer:
30
Step-by-step explanation: