Question

Find the slope of a line perpendicular to 2x-y=16
8
2
1/2
-1/2
* what's the formula ? So I can try and figure it out first

Answer 1

well first you must find the slope originally:
2x=16+y
2x-16=y
therefore the slope is 2
so perpendicular means put this value under 1 and take the negative of it:
so your slope is 1/2 and then take the negative:
-1/2 is your answer

Answer 2

what's the formula ? So I can try and figure it out first

if lines are perpendicular the product of the slopes is -1
m* m1 = -1
slope of line 1 = m slope of perpendicular, m1 = -1/m