What is the slope of the line passing through the point (4, −2) and perpendicular to the line y = 4x + 2? Write your answer as a fraction.

Question

mathteacher1729 · Answer

@louis234 What is the SLOPE of the line we are looking for?  
HINT: It must be perpendicular to the line y = 4x+2

rulnick · Answer

Slope perpendicular to slope m is -1/m.

Your slope is 4, so the perpendicular slope is ... ?

anonymous · Answer

4

rulnick · Answer

Well, no.  Watch the sign.  It's -1/m, where m=4.

anonymous · Answer

-1/m means that you will flip and change the sign...  when you are given 4 you also have 4/1 so the flip of that would be..?

rulnick · Answer

A line y=4x+2 has slope m=4.
All perpendicular lines to lines with slope m have slope -1/m.
So ... any questions?