Homework Help: math urgent...:(

Posted by veronica on Thursday, January 29, 2009 at 1:25pm.

Write the equation of a line perpendicular to 2y=3x+4 and passes through the point (7,-2).

Please help me i have no idea in this.
and please4 explain me how you did it. thanks.

math urgent...:( - drwls, Thursday, January 29, 2009 at 3:09pm
The slope of the perpendular line must be -2/3. That is because the slope of your original line is 3/2. (The product of the slopes of perpendicular lines is always -1.)

Therefore the equation of the second line is of the form

y = (-2/3) x + C

Use the fact that y = -2 when x = 7 to compute the constant C.

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