Which equation describes the sum of the vectors plotted below

Alinear relationship would look like a straight line on the graph. it could have a positive negative or 0 slope. so it could be a line potentially going in any direction but it must be perfectly straight.

Wooden , walls ,doors ,support

Answerapplying a direct current to a non magnetic material in order to create a electromagnetic field; plz check first good luck;

The sun's gravitational pull is weaker on the planets that are closer to it, i think.