Locus of a Parabola (1 of 3: Defining features)

[@thehack8814]

Which country you are working in( sorry for bad english)

[@MCilja]

He is from Australia :)

[@samk6042]

Australian mate

[@teja7986]

Australia (sorry for bed english)

[@babybeel8787]

Keep up the good work! ^^

[@Teranova]

This doesn't explain how this works, just shows the process, so I'm still at the beginning of understanding the function of it. No help in that regard.