Question

Answer choices
Question 3 options:



a relation only



a function only



both a relation and a function



neither a relation nor a function

Answer 1

a function has no repeat on its x-coordinates in a points set, now, check this one for any x-repeats,

$\bf \begin{array}{ccll} x&y\\ \text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\ -4&0\\\\ \stackrel{rep eat}{-1}&-3\\\\ -3&5\\\\ \stackrel{rep eat}{-1}&1 \end{array}$