The function g(x) is [tex]\rm4x^2[/tex] and the graph is attached in the question the correct option is B.
What is the linear graph?
Linear Graph Linear means straight and a graph is a diagram that shows a connection or relation between two or more quantities.
The given graph is;
[tex]\rm f(x)=x^2[/tex]
The graph of g(x) = f(2x) is given by;
[tex]\rm g(x) = f(2x)\\\\g(x) = f(2x)^2\\\\g(x)=4x^2[/tex]
Hence, the function g(x) is [tex]\rm4x^2[/tex] and the graph is attached in the question the correct option is B.
Learn more about graphs here;
https://brainly.com/question/21981889
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