Question

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Q2:IF X IS DIRECTLY PROPORTIONAL TO Y Square and X is 8 when y=2 find
(1) x when y =3
(2)y when x=50
solve step by step
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Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

when, x is directly proportional to y²!!

x ∝ y²

x = k y²

where, x = 8 and y = 2

8 = k (2)²

8 = k 4

8/4 = k

k = 2

(1) find x when y = 3, k = 2

x = 2 × (3)²

x = 2 × 9

x = 18

(2) find y when x = 50, k = 2

50 = 2 y²

50/2 = y²

y² = 25

Taking square root on both sides

√y² = √25

y = 5

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