Question

Determine whether the relation is a function.

{(-5, -4), (-2, 9), (-1, -2), (-1, 7)}

Answer 1

Hello and Welcome to Openstudy! :)

a relation is a set of ordered pairs
a function is a relation with only unique (non-repeated) x-values
so if x-values are (x, y)
then are any of them repeated?

Answer 2

so it's not a function.

Answer 3

if x values return one and only one y value then it is a function.
if an x value returns more than one y value, it is not a function

Answer 4

correct :)

Answer 5

Determine whether the relation is a function.

{(-7, -1), (-7, 2), (-1, 8), (3, 3), (10, -7)}

Answer 6

this is a function
{(-7, -1), (-7, 2), (-1, 8), (3, 3), (10, -7)}

Answer 7

same idea as before :)
are any x-values repeated?

Answer 8

Does it look like a function to you? Use the definitions the users @ehuman and @jigglypuff314 used.