For problem 2, you are correct in stating that a curve forms. Specifically, if we were to trace along the outer edge of the shape, then we'd form a <u>parabola</u> that has been tilted 45 degrees compared to the more familiar form that students are taught (where the axis of symmetry is vertical).
For more information, search out "Tangent method for parabolas". As the name implies, the tangent method draws out the tangents of the parabola which helps form the parabola itself.
Everything else on your paper is correct. You have problem 1 correct, and the table is filled out perfectly. Nice work.
 
        
             
        
        
        
Answer:
Center: (-9, -7)
Radius: 5
Step-by-step explanation:
 
        
                    
             
        
        
        
(6+23)=29
(32-25)=7
(29)x(7)+(7x7)
203+49= 252
the answer is 252
        
             
        
        
        
It could be a linear graph with a negative slope 
x axis  is height above ground and y axis id air pressure
so there willbe a point  at (0,14.7) on y axis representing the pressure at sea level. There will be another point at (3.6, 7.35) where  air pressure is half that at ground level. The straight line will continue until it reaches the x axis  ad (0, 7.2)  where there is no air pressure.