Which of the following tables represents a function?

100 points, hi, i’m not sure how to get the equation from the graph and table.

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?