Determine whether the following graph is a direct variation. Explain how you came to your conclusion.

i believe the answer is the polygon, heptagon.

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)

2y+y=5

add 2y and y