Arecipe uses 6 cups of sugar for 15 people. at the same rate, how much sugar is needed for 40 people

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

3x + 4y -25 =0 represents the amount of change sianna should recieve