From the following data, estimate the population for the year 1986 graphically.

year	1960	1970	1980	1990	2000
Population (in thousands)	12	15	20	26	33

Using graphic method, find the value of y when x=27.

x	10	15	20	25	30
y	35	32	29	26	23

Find y when x = 0.2 given that

x	0	1	2	3	4
y	176	185	194	202	212

If y₇₅ = 2459, y₅₀ = 2018, y₈₅ = 1180, and y₉₀ =402, find y₈₂

x	75	80	85	90
y	2459	2018	1180	402

Find the number of men getting wages between Rs. 30 and Rs. 35 from the following table.

Wages (x)	20 - 30	30 - 40	40 - 50	50 - 60
No. of men (y)	9	30	35	42