Annie set her watch 11 seconds behind, and it falls behind another 1 second every day. How many days has it been since Annie last set her watch if the watch is 29 seconds
behind?

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb

you can't solve x because it is 2 linear equation and you only have one equation