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)}

{(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

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or  

y -5 = (-1/4)(x + 8)

step-by-step explanation: