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+ w − = 70°
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is
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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 
= k, where k is a positive constant.
(iv) When distance is kept fixed, then speed and time vary inversely with each other.
| (i) | (ii) | (iii) | (iv) | |
| A | T | F | F | T |
| B | T | T | F | F |
| C | F | F | T | T |
| D | T | F | T | F |