Answer:
y-intercept: 11
which means the baby weighs 11 lb when it is born (t=0).
Step-by-step explanation:
 
        
             
        
        
        
Y varies inversely with x
means that y=k/x 
with x=0.7 and y=80
we have 80=k/0.7
k=0.7x80=56
so the equation is 
y=56/x
        
                    
             
        
        
        
Answer:
9
Step-by-step explanation:
i think plz give brainleast
 
        
             
        
        
        
First find slope 
5-10/-1-0= 5
find y-intercept
10=5(0)+B
b=-10
equation: y=5x-10