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f(x) = |x|

g(x) is obtained by vertically stretching f(x).

At x = 1 , f(x) = 1 and g(x) = 3 = 3*1

At x = 2, f(x) = 2 and g(x) = 6 = 3*2

So, f(x) has been vertically stretched by a factor of 3 to obtain g(x).

Hence,

g(x) = 3|x|

ANSWER: g(x) = 3|x|

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