1
12
−
-1
Correct answer is A
(x+3) \propto y\\
∴x + 3 = ky\hspace{1mm}when\hspace{1mm}x = 3, y = 12\\
3+3 = 12k\\
∴ k = \frac{1}{2}\\
\Longrightarrow x + 3 = \frac{1}{2}y to find x when y = 8
x + 3 = \frac{1}{2}\times 8\\
x=4-3\\
x = 1
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