What is the direction, in degrees and to 2 decimal places, for the vector whose column form is \[ \begin{pmatrix} a & b \end{pmatrix} \] where $a = 19$ and $b = -5$? Do not give any units in your answer. Your answer must be between $-90°$ and $270°$.
I got the answer as $-75.26°$. I used
\[ \arctan \frac{19}{-5}\]