The tickets sold on a train ride are decided into 2 categories, premiere seats and economic seats. The premiere seats cost $120 each. The economic seats cost $75 each. There are 375 premiere seats and x economical seats on a train. What is the number of economic seats?

what is the question you are asking?

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.