FIRST YOU WILL NEED TO GO TO desmos.com

NEXT YOU CAN CHOOSE AN IMAGE TO DRAW. I WENT WITH A HALLWAY.

YOU WILL HAVE TO IMPORT YOUR PICTURE.

YOU CAN CHOOSE THE PICTURE FROM YOUR EXISTING PICTURES...

AND INSERT YOUR PICTURE INTO THE GRAPH.

I CHOSE TO STRETCH MY PICTURE TO FIT THE SCREEN.

NOW I'M READY TO START DRAWING BY GRAPHING EQUATIONS.

BY USING BRACKETS, I CAN PUT RESTRICTIONS ON MY EQUATIONS.

I ADDED MY EQUATION FOR THE SIDE OF THE DOOR INTO THE PARENTHESIS.

AND NOW FOR THE TOP OF THE DOOR.

AGAIN, BRACKETS TO RESTRICT THE FUNCTION TO THE LENGTH I WANT.

THE LEFT SIDE OF THE DOOR.

...AND THE BOTTOM OF THE DOOR.

CAN'T FORGET THE DOORKNOB. I ADDED AN EQUATION FOR A CIRCLE.

REMOVE THE ORIGINAL PICTURE...

AND THE GRIDLINES...

AND ALL I HAVE LEFT IS MY DRAWING - A DOORWAY TO NEW THINGS.