Which set of ordered pairs represents a function?
{(0, 1), (1, 3), (1, 5), (2, 8)}
{(0, 0), (1, 2), (2, 6), (2, 8)}
{(0, 0), (0, 2), (2, 0), (2, 4)}
{(0, 2), (1, 4), (2, 6), (3, 6)}

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- anonymous

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- anonymous

the definition of a function is that there are x values that represent one image only one. so there can be different image values(y-values) having the same x value but not the other way around

- anonymous

so would it be the first one

- anonymous

i think the last one
because it has unique x values for y

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- anonymous

ok so r u sure the last one

- anonymous

yes draw it and you see it quite clear that there are unique x values because in the other ones it says not!

- anonymous

can you help me with this one
Look at the graph:
A coordinate grid from negative 16 to positive 16 is drawn with both in increments of 2. A straight line passing through the points 0, 2 and negative 8, 2, and 8, 2 is drawn.
What is the relationship between x and y?
y and x stay constant
y increases as x increases
y decreases as x increases
y stays constant as x increases

- anonymous

i think it is the first one

- anonymous

no because x= 1 gives y=3 and x=1 gives y= 5 that is no function

- anonymous

ohhh ok do you think it is the last one

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