Is this an AP ?

-1,-1,-1,-1,-1,-1,-1,-1

Yes this is an A P because the common difference is 0 , thus the series is formed with a common difference which is an AP

lol we need to see what the question is asking about

step-by-step explanation:

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.