Question

i need help this year im taking alg 1 and im cyberschooled and im not learning much i need someone to help me and kinda walk me through how to solve these i dont need you to give me the answer i just need you to tell me how to solve i cause im so lost!!!
1. The table below shows the values of y for each value of x.
X
Y
-1
0
1
-1
2
1
2
-2
Part A: Does the table represent a function? Justify your answer by using the values shown in the table (4 points)

Answer 1

your table got discombobulated

Answer 2

x y
-1 0
1 -1
2 1
-2 -2

Answer 3

ok i see

Answer 4

so a function is basically a correspondance between two list of numbers, but in the first list you cannot have repeats

Answer 5

in our example, the first list is X and the second list is Y

Answer 6

X has no repeats , so its a function

Answer 7

oh okay so you mean since none of the numbers repeat it is a function?

Answer 8

so they are both a function im guessing?

Answer 9

this is one function

Answer 10

a function is a pairing up of values between two sets
so you can think of the function as

f = { (-1, 0) ( 1,-1) ... }

Answer 11

there are a lot of words for function, pairing up, correspondance,

Answer 12

okay so for my answer i would basically just write yes because they are all pairs?

Answer 13

im sorry i just don't understand much because im not learning much in cyberschool and im really struggling

Answer 14

not all pairs of numbers are functions , though

Answer 15

{ ( 1,2) (1,3) } this is not a function, because x =1 is repeated

Answer 16

oh okay so you mean that you cant have the same number anywhere in the x or y column for it to be a function?

Answer 17

like if you have a number repeat in the column its not a function

Answer 18

on the X side, correct

Answer 19

its ok to repeat on the Y side

Answer 20

oh alright so then i write yes because none of the numbers on the x column repeat

Answer 21

you can think of a function with some real world examples/

there is a function between the set of humans and the set of numbers (their age)

Answer 22

every person has exactly one age. a person can't have two different ages

Answer 23

so the function might be something like this

{ ( John , 17) (Tim, 27) , (Sarah, 31) , .. }

Answer 24

oh wow that makes sense why can't my math teacher explain it like this

Answer 25

i dont know.. :/

Answer 26

keep tagging me because i will help other people . if you have a question.
also if you close this question, your new question will go to the top

Answer 27

okay im gonna try and work on the rest of the parts to this question if i need help i'll tag you