Step-by-step explanation:
This rule states that the same value can be added to both sides of an equation without interfering with the solving process of the equation 
 
        
             
        
        
        
Step-by-step explanation: The figure shown here is a straight path between points that extends forever in both directions, so it's called a line.
Since a line doesn't have endpoints, it doesn't matter which
two points on the line we use to name the line.
I have attached 5 possible names for the line below.
 
        
                    
             
        
        
        
X=5 is the answer because
        
             
        
        
        
Answer: y is less than or equal to -1
How?
The graphs highest value it will ever reach, range wise, is -1. Therefore it isnt 0, or all real numbers.
The reason why it is -1 and not -2 is because the curve hits -1. Sure, -2 is included in the range, but y is less than or equal to -1 INCLUDES -2 
:)