Area of triangle is 1/2 times base times height
lets say the base is from x1,y2 to x1,y1 the distance is 6 units
1/2 times 6 times height 
from x1,y1 to x3,y3 is 7 units to the right
1/2 times 6 times 7=3 itmes 7=21
area=21 square units or 
21 units^2
        
                    
             
        
        
        
I personally think its B but you gotta say if its either multiplication or addition or division 
 
        
                    
             
        
        
        
Answer:
slope is -5
Step-by-step explanation:

This equation is in slope-intercept form:

where m is the slope and b is the y-intercept.
In the given equation, the slope is -5 and the y-intercept is 1.