Answer:
Rate of change =  change y / change x 
Change y = + 1 
Change x = + 2
SO the rate of change is 1/2
WHAT IS THE Y VALUE WHEN X IS 9 
 y = 1 MULTIPLY by 4.5 = 4.5
x = 2 MULTIPLY by 4.5 = 9 
Y = 4.5 when x = 9 
 
        
             
        
        
        
The answer is the product of their slope is -1. 
First, let's break this down. Perpendicular lines are line with opposite reciprocal slopes. Opposite meaning the inverse sign and reciprocal meaning flipped. 
For instance, 
If a line had the slope of 5, its inverse would have a slope of -1/5.
Now, if we multiply these numbers together, 
5 * -1/5 = -1
The 5's cancel out.
This works for any two perpendicular lines
 
        
             
        
        
        
Answer:
C 111
Step-by-step explanation:
 
        
                    
             
        
        
        
K well uh i don't know what u meant but the 4th one i think so u