The sum of x and 15 please help

the sum of x and 15 is -16 because it is a straight line which means the straight line is a function.

all it means is function 3

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