Question

7. Which of the following relations is a function?

O {(2, -3), (-3, 2), (2, 3), (-2, 3)}
O {(-7, 6), (6, -7), (-7, 9), (10, 3)}
O {(5,-4), (-4, 5), (-5, 4), (4, -5)}
•{(8. -5), (-5, 8), (-5, -8), (-8,5)}
​

Answer 1

It's the third option.

Explanation:

The third relation s a function because it is a one-to-one relation whilst the others are one-to many relations. For example , in the first relation the x-value 2 maps to -3 and 3.

Answer 2

The third one

Explanation:

no x values are the same