The water level starts at 3 metres and decreases by 0.5 metre every month. After each month, the height reduces regularly. This forms a linear decay pattern because the decrease remains constant with time.
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The journey starts with a fixed cost of 100 rupees. The cost increases by 60 rupees for every kilometre travelled. For distances from 0 to 10 km, the costs form a linear growth pattern with constant increase.
Sarita reads 20 pages daily from a 500-page book. In 15 days, she reads 300 pages. Therefore, 200 pages are left. The linear pattern representing remaining pages after n days is 500 minus 20n.
The rally begins with 120 members. Every hour, 9 members leave the group. Therefore, after n hours, the number of remaining members is represented by the expression 120 minus 9n. This shows a linear decay pattern.
The fare for the first 2 km is 25 rupees. After that, the fare increases by 15 rupees per km. For 10 km, the extra distance is 8 km. Therefore, the total fare is 145 rupees.