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solve the linear equation by graphing -3x-y=0

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1 Answer

-3x-y=0
-3x=y
y=-3x+0 where -3 is the slope and 0 is the y-intercept
the slope can be written as -3/1 or 3/(-1) and is the rise/run
start at the origin and move 1 unit to the right and 3 units down to point (1,-3)
from this point again move 1 unit to the right and 3 units down to point (2,-6)
call the slope 3/(-1) this time
from the origin move 3 units up and 1 unit to the left to point (-1,3)
from this point again move 3 units up and 1 unit to the left to point (-2,6)
you now have 5 points including the origin
connect the dots with a ruler and put arrowheads at each endpoint