The function $y=-3\sqrt[\phantom{2}]{2x+7}$ is transformed from the base function $y=\sqrt[\phantom{2}]{x}$ by

Q$1\mathrm{.}1$

$10$ Points

firstly

horizontal compression by $\frac{1}{2}$ and right shift by $7$ units,

horizontal compression by $\frac{1}{2}$ and left shift by $7$ units,

horizontal stretch by $2$ and right shift by $7$ units,

horizontal stretch by $2$ and left shift by $7$ units,