Will literally pay someone to do my delta math !! it’s algebra 2

How do i do this using elimination 2x+3y=12 x-y=6

Algebra 1: unit 6 part 2 of test a) the table shows a linear function. x 0 1 2 3 5 13 21 29 37 45 53 (a) determine the difference of outputs of any two inputs that are 1 unit apart. show your work. (b) determine the difference of outputs of any two inputs that are 2 units apart. show your work.

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?