For the first question the answer is the second option.
For the second question the answer is the first option.
Hope I didn't mess up for your sake
        
                    
             
        
        
        
Clearly, alternative B
y = 0.01x + 7.5
y = (0.01)*5000 + 7,5
y = 50 + 7.5
y = 57.50
        
                    
             
        
        
        
It would be c because fe is a radius ba is a chord and ec isnt a line