The national interest rate on houses for 25 years is 4.3%. The banker wishes to test that the local interest rates are lower than the national rate. So he should use the initial data of 4.3% interest as his base data. Then he should investigate the rates of houses in the local vicinities and compare it to his base data. 
        
             
        
        
        
The answer is x = 2 that's what I think
        
             
        
        
        
Can you make the question more clear