If y ∝ x² and y = 50 when x = 5 find y when x = 2?
- 7
- 8
- 9
- None of these
Explanation
y ∝ x^2 means y = k x^2, where k is a constant.
Given: y = 50 when x = 5
Put values:
50 = k _ 5^2
50 = k _ 25
k = 50 / 25
k = 2
Now find y when x = 2:
y = k x^2
y = 2 _ 2^2
y = 2 _ 4
y = 8
Last verified on 23-05-2026
Related MCQs
- sinx
- tanx
- cosx
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- (x + 2)(x + 1)
- (x - 2)(x + 1)
- (x + 2)(x - 1)
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
