Plz help I don’t know how to solve this

Part a: select all of the ordered pairs that are located on the graph of the equation. part b: does the graph of the equation represent a function? select all correct answers for part a and one answer for part b.

What is the value of x in the following equation. -x ^3/2 = -27

The holiday party will cost $160 if 8 people attend.if there are 40 people who attend the party, how much will the holiday party cost