1.

Observe the following tables and find if x and y are directly proportional.

(i)

X	20	17	14	11	8	5	2
y	40	34	28	22	16	10	4

(ii)

X	6	10	14	18	22	26	30
y	4	8	12	16	20	24	28

(iii)

X	5	8	12	15	18	20
y	15	24	36	60	72	100

If we fix time period and the rate of interest, simple interest changes proportionally with principal. Would there be a similar relationship for compound interest? Why?

Following are the car parking charges near a railway station upto

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In question 2 above, if 1 part of a red pigment requires 75 mL of base, how much red pigment should we mix with 1800 mL of base?

A machine in a soft drink factory fills 840 bottles in six hours. How many bottles will it fill in five hours?

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In a model of a ship, the mast is 9 cm high, while the mast of the actual ship is 12 m high. If the length of the ship is 28m, how long is the model ship?

Suppose 2 kg of sugar contains 9 x 10⁶ crystals. How many sugar crystals are there in (i) 5 kg of sugar? and (ii) 1.2 kg of sugar?

Rashmi has a road map with a scale of 1 cm representing 18 km. She drives on a road for 72 km. What would be her distance covered in the map?