Is this shaded below or above the line?

Answer:
below the line
Step-by-step explanation:
The "shading" is the blue/purple color. The graph is shaded below the line y=-2x+6, as it should be when y is less than or equal to -2x + 6.
(Values of y get smaller in the downward direction, to for any given value, ones that are less than that will be below it.)