Which statement best explains if the graph correctly represents the proportional relationship y = −2x?

A coordinate plane is shown. Points are graphed at 2 comma 4 and negative 1 comma 2. The points are joined by a line.

The graph correctly represents the proportional relationship y = −2x because the points (2, 4) and (-1, 2) lie on the line, and the slope of the line is -2, which matches the coefficient of x in the equation. This indicates that as x increases, y decreases by a factor of -2.