Math Is Fun Forum

icy_A

Member

Registered: 2007-10-04

Posts: 5

i need help!!!!!!!!!!!!!!

can anyone show and do this problem for me???

passes through (-8,-7), perpendicular to a graph of y=4x-3.

bossk171

Member

Registered: 2007-07-16

Posts: 305

Re: i need help!!!!!!!!!!!!!!

If a line is perpendicular to another, it means their slopes are opposite reciprocals. That means that if one line has a slope of m and another is perpendicular to it, then the second line has a slope of -1/m

I imagine every text book has their own version of this equation, but I learned it as:

So we have

Therefore

Last edited by bossk171 (2007-10-04 14:14:05)

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There are 10 types of people in the world, those who understand binary, those who don't, and those who can use induction.

icy_A

Member

Registered: 2007-10-04

Posts: 5

Re: i need help!!!!!!!!!!!!!!

thanks man i appreciate it and i think i figured out how to do it now!!!