Hi,

Find the value of "a" for which the graph of the first equation is

 perpendicular to the graph of the second equation.

Ex:

y = ax - 5 ; 2y = 3x

Using the standard slope-intercept form for an equation of a line y = mx + b  

where m is the slope and b the y-intercept.  

 2y = 3x   0r    m = 

Perpendicular lines have slopes that are negative reciprocals of one another:

 y = ax - 5    m =    Note:  



    a = 

graphs of (Green) and (Blue)



 

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