If any of you could answer this? thanks

1. what is the formula for finding the vertical distance between two points on a coordinate plane?

Explain how you could use the interactive table to tell if sets of points are on the same line. math 8

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?