Whoa, I didn't know this thread existed. This'll come in handy.

So, there is a set of 4 problems in my math review:

5. Which sets of ordered pairs represent functions from A to B? Explain why or why not.

A = {10, 20, 30, 40} and B = {0, 2, 4, 6}

a. {(20, 4), (40, 0), (20, 6), (30,2)}

b. {(10, 4), (20, 4), (30, 4), (40, 4)}

c. {(40, 0), (30, 2), (20, 4), (10, 6)}

d. {(20, 2), (10,0), (40, 4)}

I don't necessarily need the answers, but I need to know how to perform this type of problem for tomorrow. Thank you to anyone in advance.

Double ninja'd