What transformation has been applied to the function in the graph to get the dashed line?

Reflected across the $y-$axis by adding $-1$ to the function.

Reflected across the $x-$axis by adding $-1$ to the function.

Reflected across the $y-$axis by multiplying the coefficient of $x$ by $-1$

Reflected across the $x-$axis by multiplying the coefficient of $x$ by $-1$