Negative means less. 
Positive means more.
as a negative # moves farther away from 0, it becomes smaller.
i.e.
-5,-4,-3,-2,-1,0,1,2,3,4,5,6,7
-5 less than 7.
 
        
                    
             
        
        
        
We can do this by subtracting 7x from both sides, getting us:
11y= -7x+10.
We can then divide both sides by 11, giving our final answer:
y = -7/11x+10/11.
Hope this helped!
        
                    
             
        
        
        
If a right circular cone intersects a plane that runs parallel to the edge of the cone, the resulting curve will be a <u>parabola</u>. 
A parabola is curved from one end and open from other end, therefore it would fit the best. 
Hope I could help! :)
 
        
                    
             
        
        
        
I’m pretty sure it’s -15 but don’t take my word for it