The graph of the function \( f(x)=\cos (x) \) is stretched vertically by a factor of four to create the graph of the function \( g(x) \). What is the function rule for \( g(x) \) ? Enter your answer in the box. \( g(x)=\square \)

The function \( g(x) \) is created by vertically stretching the function \( f(x) = \cos(x) \) by a factor of four. This means that every output of the original function is multiplied by four. Therefore, the function rule for \( g(x) \) is: \( g(x) = 4 \cos(x) \)