If Yvaries directly as X, And Y is 6 when X is 72, what is the value of Y when X is 8

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

Tyler enjoys the fish so much that after his birthday his family decides to take him to a famous aquarium a tank at the aquarium is similar to his tank with the scale factor of 8 how many times greater is the volume of the tank at the aquarium than the volume of tyler tank

What are the first 4 terms in the multiplication pattern given by the formula 2×4n