SOLUTION: Please help me graph this equation{{{y=-expr(1/2)x-4}}}

Algebra ->  Coordinate-system -> SOLUTION: Please help me graph this equation{{{y=-expr(1/2)x-4}}}      Log On


   

Question 486910: Please help me graph this equationy=-expr%281%2F2%29x-4
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Looking at y=-%281%2F2%29x-4 we can see that the equation is in slope-intercept form y=mx%2Bb where the slope is m=-1%2F2 and the y-intercept is b=-4


Since b=-4 this tells us that the y-intercept is .Remember the y-intercept is the point where the graph intersects with the y-axis

So we have one point




Now since the slope is comprised of the "rise" over the "run" this means
slope=rise%2Frun

Also, because the slope is -1%2F2, this means:

rise%2Frun=-1%2F2


which shows us that the rise is -1 and the run is 2. This means that to go from point to point, we can go down 1 and over 2



So starting at , go down 1 unit


and to the right 2 units to get to the next point



Now draw a line through these points to graph y=-%281%2F2%29x-4

So this is the graph of y=-%281%2F2%29x-4 through the points and