Which graph represents a decreasing function? graph a graph b graph c graph d

Graph A represents a constant function; when x increases: y still the same (no change).

Graph B represents a growing function, when x increases , also y increases.

Graph C represents a decreasing (decay) function becasue when x increases, y decreases.

and for  Graph D, it is not even a function .

So it would be: Graph C

If its decreasing it would be C because your line is going down