If y varies directly to x and y = 27 when x = 3. Find y when x = 11?
- 77
- 66
- 99
- None of these
Explanation
Since y varies directly with x, we can write:
y = kx
where k is the constant of proportionality.
Given y = 27 and x = 3:
27 = k(3)
Divide by 3:
k = 9
Now, use this value of k to find y when x = 11:
y = 9(11)
y = 99
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