It decreased $7 in the last 2 days
        
             
        
        
        
so y=5x on a graph is going to look like a 5/1 slope. X represents days and Y represents miles. So (1,5) means in 1 day Fran runs 5 miles.
        
                    
             
        
        
        
<span> we know that the 90 percentile in Z-score is ≈ 1.28 then, 
=136 ± 1.28(13.8) 
=(118.336 , 153.664) 
</span>hope it helps
        
             
        
        
        
-3 it’s the rise over run I believe & because it’s going down it’s negative