State ?T? for true and ?F? for false. (i) If x and y are in direct proportion, then (x-1) and (y-1) are also in direct proportion. (ii) If x and y are in inverse proportion then (x+2) and (y+2) are also in inverse proportion. (iii) Two quantities x and y are said to vary directly with each other if \[\frac{x}{y}=k\], where k is a positive constant. (iv) When distance is kept fixed, then speed and time vary inversely with each other.

• A. (i) (ii) (iii) (iv) T F F T                
• B.        (i) (ii) (iii) (iv) T T F F                
• C.        (i) (ii) (iii) (iv) F F T T                
• D.        (i) (ii) (iii) (iv) T F T F