Can someone help me out with this? Please do it correctly!

Identify the parent function that can be used to graph the function f(x)= (1/4x)^3

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

What is the rate of change of a line that passes through (2,-5) and (6,-2)?