Question 49330
You are correct the slope is (-2/1), but it is also (2/-1) and the y-intercept is (0. -5).

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Starting from (0, -5), for a slope of (-2/1), move down two and to the left one space.  Plot this point (1, -7).  From this point move down two and to the left one space.  Plot this point (2, -9).  Continue plotting points until you have two or three points plotted.
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Starting again from (0, -5) , but use the slope of (2/-1), move up two and to the right one space.  Plot point (-1, -3).  From this point repeat the process.  You should land on point (-2, -1).  Continue until you have two or thiree points plotted.
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Connect the dots.  This should give you a good representation of the graph of the line: y =  -2x - 5
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 {{{ graph( 300, 200, -6, 5, -8, 5, -2x - 5) }}}