graph #4 (last graph) depict the function f(x)= -m(x-d)^1/5 i
step-by-step explanation:
we know that
m=slope
but in this function slope is -m that means slope is decreasing and it is decreasing by 1/5 points down the x-axis.
which is shown in graph four
a decreasing slope down x-axis by 1/5 points.
hence 4th graph is the right option for this.