Question

How do you find three different ordered pairs `y=2x+1`?

Answer 1

Pick `3` arbitrary values for `x` and evaluate for corresponding `y` values to give `(x,y)` pairs.

Explanation:

For example if I choose
`color(white)("XXX")x in {0, 1, 2}`

#{:(underline(x),color(white)("XX"),underline(y=2x+1)), (0,,color(white)("XXX")1), (1,,color(white)("XXX")3), (2,,color(white)("XXX")5) :}#

Giving the ordered pairs
`color(white)("XXX")(0,1), (1,3), (2,5)`