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Which is the best type of graph to show the percentage of students who bring their lunch
from home or buy their lunch at school?

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

i believe it's a.

i'm not sure on this one, most likely correct.