Does the following table shows a proportional relationship between the variables x and y

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?

F(x)=5/6x+3 which of the following is true