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## #1 2018-03-09 23:39:53

Monox D. I-Fly
Member
From: Indonesia
Registered: 2015-12-02
Posts: 1,099

Determine the reflection of a parabola

by the line y = -x.

I know how to do it graphically, but please tell me how to do it algebraically.

Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away. May his adventurous soul rest in peace at heaven.

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## #2 2018-03-10 00:01:30

bob bundy
Registered: 2010-06-20
Posts: 8,274

hi Monox D. I-Fly

Try this:

Replace every x with y, and every y with x.  Then change all the signs on both x and y.

That gives:

Hope that helps,

Bob

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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## #3 2018-03-10 01:00:48

Monox D. I-Fly
Member
From: Indonesia
Registered: 2015-12-02
Posts: 1,099