## anonymous one year ago Lines k and p are perpendicular, neither is vertical and p passes through the origin. Which is greater? A. The product of the slopes of lines k and p B. The product of the y-intercepts of lines k and p

1. IrishBoy123

this is a chain of thought: $$y_k = m_k x + c_k$$ $$y_p = m_p x + c_p$$ [A]: "p passes through the origin. " $$c_p = 0$$ [B]: "Lines k and p are perpendicular" $$m_k \times m_p = -1$$ "Which is greater?" "A. The product of the slopes of lines k and p " $$m_k \times m_p = -1$$ B. The product of the y-intercepts of lines k and p $$c_p = 0$$ and "neither is vertical" $$\implies c_k \times c_p = 0$$ does that help you or hinder you??!!

2. anonymous

OMFG

3. anonymous

HINDER HINDER DEFINITELY HINDER

4. IrishBoy123

soz to shorten: line p goes through origin so its intercept is zero. the lines, k & p, are perpendicular .... so the products of the slopes is -1.

5. anonymous

which intercept? y or x?

6. IrishBoy123

it goes through the Origin. it is therefore y = mx. it hits both axes at (0,0)

7. anonymous

hmmmmmmmmm

8. IrishBoy123

soz @yomamabf , haven't helped, have i ?!?! but: bed, tired. hope you get there :p