The task:

I need a LEGO car that is powered by an elastic band, and that can
move straight forward for at least a meter. The faster it can go, the
better, but all its wheels must stay on the ground the whole time.

you have done that

Brainstorm some ideas.

Remember the Rules for Brainstorming.

Step 2 - Brainstorm and research.

Question 2a on your Google Doc is: I brainstormed these ideas to build the car by myself.

Add your own brainstormed ideas to the box, at least three of them.

Do Research

Question 2b on your Google Doc is: I found these ideas after I did some research

Use the links to do some research, and add ideas you found to the box.

DO NOT cut and paste.

Links:

Two ways to build a rubber band powered LEGO car

Rubber band powered LEGO car

Another rubber band powered LEGO car

Rubber band sling-shot car

Images for rubber band LEGO car

Rubber band car using gears

Now add more ideas to your brainstorming list of ideas.

Call me to check your work before you move on to Step 3.