ASAP 7 POINTS + LINK TO A 50 POINT QUESTION Which of the following will always represent a function?

1: a table of pairs of numbers

2: an equation in the form y = mx + b

3: a list of ordered pairs

4: a list of numbers

Link to 50 point question:

 2: an equation in the form y = mx + b

1. An x/y table may have two entries with the same x; not a function in that case.

2.  That's a line with a slope; for each x there's a single y, definitely a function

3.  Ordered pairs -- like the table, the same x with different ys is possible, which wouldn't be a function.

4. List of numbers  -- a list isn't a function, at least not without more context

the ratio of balloons to tables is 5: 2 and the constant variation is 5.

the equation is y=5x