Question

Which set of points represents a function?

0 (3,0), (0.6), (1,5), (0,0)
O (-3,7), (3,7), (7,3), (-7, -3)
O (4,2), (4,-2), (2,5), (2,-5)
O (-3,9), (-2,4), (0,0), (-2,4)
O None of the other answers are correct

Answer 1

(-3,9) (-2,4) (0,0) (-2,4)

Explanation:

A function is a relation between sets of points, where for each input (x), there is only one output (y).

So even though (-2,4) is repeated, it's still a function because each input only produces one output.

First set (0,6)(0,0) 0 produces both 6 and 0, not a function

Second (-3,7)(3,7) both -3 and 3 produce 7, not a function

Third (4,2)(4,-2)(2,5)(2,-5) 4 produces both 2 and -2. Also 2 produces both 5 and -5, not a function

Answer 2

None because I put all of them into a graph calculator that you can download ;)

None of them make straight lines that pass through the origin.