Question

observe the following tables and find which pair of variables (xandy)ARE in inverse proportion

Answer 1

1.
50*5=250
40*6=240
30*7=210
20*8=160
so it is not
inversely proportional
2.
100*60=6000
200*30=6000
300*20=6000
400*15=6000
so it is Inversely proportional

Answer 2

in Table 2 Values are in inverse proportion

Step-by-step explanation:

x & y are inversely proportional

=> x ∝ 1/y

=> xy  ∝ 1

=> xy  = K  (constant)

Table 1

x    50       40      30      20

y     5         6        7        8

xy   250   240     210    160

xy is not constant

Hence in Table 1 Values are not in inverse proportion

Table 2

x    100       200      300      400

y     60         30        20          15

xy   6000   6000     6000    6000

xy is constant = 6000

Hence in Table 2 Values are in inverse proportion

Table 3

x    90       60      45      30       20     5

y    10        15        20     25      30     25

xy   900   900     900    750   600   125

xy is not constant

Hence in Table 3 Values are not in inverse proportion

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