In this relation: R = { (–2, –3), (–1,–1), (0,1), (1,3) } what equation describes domain/range correspondence

Answer 1

y = 2x+1

notice that when x increases by 1, y increases by 2. that gives you the 2x. but 2(-2) = -4, not -3, so add 1. then check that it works with all of them.

Answer 2

The gist of the communicate available (sorry, there are too many pages to offer all of the links) is that wands help to concentration the magic resident in the witch or wizard, yet wandless magic remains achieveable, quite for extremely proficient human beings like Snape and Dumbledore. some examples ... Apparition Assuming one's Animagus style (or Metamorphpagus) Accio (the Summoning attraction) Elves can do magic without using wands Lumos