Answer:
18
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer
B., C. 
Step-by-step explanation:
Since the 'E' in the middle 
it represents that the angle forms at the vertex E
 
        
                    
             
        
        
        
Answer:
D. negative
Step-by-step explanation:
Let's analyze each answer choice. 
A. Zero 
A line with a zero slope is a horizontal line. The x values change, but the y values stay the same. 
B. Undefined 
A line with an undefined slope is a vertical line. The x values don't change and the y values vary. 
C. Positive 
When a line has a positive slope, the line increases from left to right. 
D. Negative 
When a line has a negative slope, the line decreases from left to right.
When we move from left to right on the graph, the line moves down. Therefore, this line must have a negative slope and D is correct.
 
        
             
        
        
        
D. F(x)=x^2. That’s The quadratic parent function