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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

\[ \arctan \frac{19}{-5}\]

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    it is @$k$crisman ! ;)2012-09-11

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Draw a picture, perhaps more or less to scale. Note that the slope is "rise" divided by "run". Or, in symbols, the slope is the change in $y$ divided by the change in $x$.

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    ah ok but still thiking how u deduce it as slope and rise cocept.. intresting take on the question2012-09-12