perpendicular crosses at a right angle, while intersecting lines don't.
http://wiki.answers.com/Q/What_is_the_difference_b...

Perpendicular lines are lines that intersect at one poi.
http://www.chacha.com/question/howareperpendicul...

Two lines are perpendicular if they intersect at right angles. They intersect at exactly one point!
http://www.kgbanswers.com/wheredotoperpendicula...

You set the other equation equal to y. so y= 7/4 3/4x. then set the two equations = to eachother. so (4/3)x + 1= 7/4 3/4x. and then solve for x, so x= 9/25. then plug x into the
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