If y is directly proportional to x and x = 2, y = 5, then find y when x = 7?
- 15
- 35/2
- 25/2
- None of these
Explanation
If y is directly proportional to x, then:
y = kx, where k is the constant of proportionality
Given x = 2, y = 5:
5 = k _ 2
k = 5/2
Now find y when x = 7:
y = (5/2) _ 7
y = 35/2
Last verified on 28-07-2026
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