Which set of ordered pairs represent y as a function of x?
A. {(-9, 2), (0, 6), (1, -2), (-3, 6)}
B. {(-1, 0), (4, 3), (-7, -3) (-1, -8)}
C. {(3, 2), (-4, -2), (3, 1), (-4, 1)}
D. {(5, 4), (2, 3), (1, 1), (2, 4)}

Question

Which set of ordered pairs represent y as a function of x?
A. {(-9, 2), (0, 6), (1, -2), (-3, 6)}
B. {(-1, 0), (4, 3), (-7, -3) (-1, -8)}
C. {(3, 2), (-4, -2), (3, 1), (-4, 1)}
D. {(5, 4), (2, 3), (1, 1), (2, 4)}

texaschic101 · Answer

it is a function if there are no x values that are the same. There can be y values that are the same, but no x values. So what do you think ? Which one has no 2 x values the same ?

texaschic101 · Answer

your points are set up like (x,y)...so which one has no duplicate of the first number in each set

texaschic101 · Answer

for instance...look at choice 4. There are 2 two's in the x value spot....that means it is NOT a function.

anonymous · Answer

is it a? im not sure

texaschic101 · Answer

excelllent...you got it. There are no 2 x values the same...it is a function

texaschic101 · Answer

typo...excellent

anonymous · Answer

thanks! and could u help me with two more questions?

texaschic101 · Answer

I can try...can't promise anything

anonymous · Answer

attachment

texaschic101 · Answer

oh...sorry...that I do not know. I am so sorry :(

anonymous · Answer

oh its okay thanks tho

texaschic101 · Answer

wait...I think it is G. I just looked up something...it was talking about a vertical line test http://msenux.redwoods.edu/IntAlgText/chapter2/section3.pdf G passes the vertical line test making it a function

anonymous · Answer

thanks! i remember something about that

texaschic101 · Answer

I am not the best with functions...I had to do some research...lol