Any help on number 4 please thank you I appreciate it

The graph of f(x) = x is scaled by a factor of 1/2 and reflected in the x direction to get g(x) = -1/2 x
Explanations:Note:
When a graph f(x) is scaled by a factor b, the resulting function becomes bf(x)
When a graph is reflected in the x-axis, the y-axis is negated.
Now, comparing f(x) = x and g(x) = -1/2 x:
The graph of f(x) = x is scaled by a factor of 1/2 and reflected in the x direction to get
g(x) = -1/2 x