MHB Drawing Contour Maps: Level Curves of $f(x,y)=(y-2x)^2$

[ineedhelpnow]

draw a contour map of the function showing several level curves $f(x,y)=(y-2x)^2$

how do i do this. i know i have $k=(y-2x)^2$ but how do i use it?

 

[alyafey22]

Use arbitrary positive values for $k$ and draw the resultant curve for each value.