Question 451720
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Hi
How can I determine if two lines are perendicular? 
I. Put both lines in the slope-intercept form
II.  compare their slopes
III. If the slopes ae negative reciprcals of one another: for ex:  -2/3 and 3/2
THEN these lines are perpendicular


*[tex \LARGE\ The \ standard \ slope-intercept \ form \ for \ an \ equation \ of \ a  \ line \ is: \ y = mx + b ] 
*[tex \LARGE\ where \ m \ is \ the \ slope \ and \ b \ the \ y-intercept]