What is the answer and workings for this equation on plotting straight-line graphs y equals -x?

y = -x

The slope of the line is -1, and its y-intercept is zero.

The graph is a 45-degree line, sloping down to the right, and passing through the origin.

The 'x' and 'y' coordinates of every point are the same number, but every point has one

positive coordinate and one negative coordinate. That's exactly what the equation is

saying.