Question

The group of points {(0, 1), (0,5), (2, 6), (3, 3)}

is not a function, but the group of points {(1, 4),
(2, 7), (3, 1), (5, 7)} is a function. What do you
notice about the two groups of points? What do
you think it means to be a function?

Answer 1

each x point should be mapped to a y point

Explanation: