Friday, September 16, 2011

Determine the line ty = 3x - 2 when it is perpendicular to the line y = 1 - x.

If the 2 given lines are perpendicular, then the product
of the values of their slopes is -1.


The given
equations are  y = 1 - x and ty = 3x - 2, so we'll have to put the equation ty = 3x -
2 in the standard from, which is y = mx+n.


Since y is
isolated to the left side, we'll just have to divide by t both
sides:


y = (3/t)*x - (2/t)


The
other line is:


y = -x+1


So,
the slope can be easily determined as m1 = -1.


That means
that the slope of the line y = (3/t)*x - (2/t) has the
value:


m1*m2 = -1


-1*m2 =
-1


-1*(3/t) =
-1


t =
3


The line, perpendicular to
the line y = 1 - x, is now determined, having as equation: y = x -
(2/3).

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