Question 18 Suppose f(x) is a function whose graph is symmetric about the y-axis.
Select all that apply.

The graph of f(kx) is symmetric about the y-axis.

The graph of kf(x) is symmetric about the y-axis.

The graph of f(x+k) is symmetric about the y-axis.

The graph of f(x)+k is symmetric about the y-axis.

The graph of f(kx)+h is symmetric about the y-axis.