Upgrade subject to access all content
Given $f(x)$, which of the following transformations have been performed to obtain $f(-3x)$? Select ALL that apply.
Reflected across the $x-$axis
Reflected across the $y-$axis
Shifted left $3$ units
Shifted right $3$ units
Compressed horizontally by a factor of $3$
Stretched horizontally by a factor of $3$