What is the equation of a line:
* perpendicular to the line y = 1/2*x - 7 and
* passing through the point (3,-4).
prependicular means that x * 1/x = -1 so,
the slope of the line is -2
y=-2x+b
now plug in the coordinates
-4 = -2*(3) + b
solve for b:
-4 = -6 +b
b = 2
the line is: y=-2x+2
-Baljeet
