Question

Match each set of ordered pairs on the left with the correct description of the relation
given by the set on the right. The descriptions on the right will be used more than
once.
{(13,6), ( – 8,3), (21, – 4), ( – 6,0), (9, – 4)}
function
{(– 32,0), ( – 16,8), (4, 56), ( - 16, – 8), (8, – 72)}
not a
function
{(500, 312), (325, 129), (103, 202), (304, 418), (325, 911)}
{( - 43, – 75), (61, – 75), (- 35, – 75), (82, - 75), (28, – 75)}

Answer 1

Answer:

{(13,6), ( – 8,3), (21, – 4), ( – 6,0), (9, – 4)}    function

{(– 32,0), ( – 16,8), (4, 56), ( - 16, – 8), (8, – 72)}    not a function

{(500, 312), (325, 129), (103, 202), (304, 418), (325, 911)}  not a function

{( - 43, – 75), (61, – 75), (- 35, – 75), (82, - 75), (28, – 75)}   function (but flat-lined !)

Step-by-step explanation:  To be a function, each x-value must have a unique y-value

In the set  {(– 32,0), ( – 16,8), (4, 56), ( - 16, – 8), (8, – 72)}  —16 has both 8 and –72 as y values so it is not a function

In the set {(500, 312), (325, 129), (103, 202), (304, 418), (325, 911)}  325 has both 129 and 911 so it is not a function.

It is ok for y-values to be repeated, but only for different x-values

Answer 2

Please please thank lord lord please please lord please