Question

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

Answer 1

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??!!

Answer 2

OMFG

Answer 3

HINDER HINDER DEFINITELY HINDER

Answer 4

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.

Answer 5

which intercept? y or x?

Answer 6

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

Answer 7

hmmmmmmmmm

Answer 8

soz @yomamabf , haven't helped, have i ?!?!

but: bed, tired. hope you get there :p