Question

hey all you algebra and higher people-
I am writing a slope intercept form of an equation that is perpendicular to another equation. Example:
(-3,-2), y=2x-4
i know how to do most of it. I'm wondering if i switch the slope from 2 to -1/2 now or late. Example:
y=x+2
(-3,-2)
-3=1*-2+b
-3=-2+b
+2 +2
-1=b
y=-1x-1
or this:
y=x+2
(-3,-2)
-2=-1*-3+b
-2=3+b
-3 -3
-5=b
you get how you have to make it a negative reciprocal to make it perpendicular? yeeah. which is right? hey all you algebra and higher people-
I am writing a slope intercept form of an equation that is perpendicular to another equation. Example:
(-3,-2), y=2x-4
i know how to do most of it. I'm wondering if i switch the slope from 2 to -1/2 now or late. Example:
y=x+2
(-3,-2)
-3=1*-2+b
-3=-2+b
+2 +2
-1=b
y=-1x-1
or this:
y=x+2
(-3,-2)
-2=-1*-3+b
-2=3+b
-3 -3
-5=b
you get how you have to make it a negative reciprocal to make it perpendicular? yeeah. which is right? @Mathematics

Answer 1

hehe same thinking! LOL

-you change it "now" so you start and continue with a slope of -1/2 :)

Answer 2

so the second example?

Answer 3

As i can see.. in the second you put a slope of -1 right?

Answer 4

yes. I have been doing my problems wrong... :(