Question

Ortencia made the following grades on her tests: test #1, 90; test #2, 80; test #3, 95; test #4, 90; test #5, 85. She wants to plot her progress on a coordinate plane where the test number is on the x-axis and the test grade is on the y-axis.

Question:

a) Write this relation as a set of ordered pairs.
b) What is the domain?
c) What is the range?

Answer 1

Hello and Welcome to QC. Here you will find a great community of people always willing to help and always ready to chat.

Answer 2

Hello and Welcome to QC. Here you will find a great community of people always willing to help and always ready to chat! Can you please post the correct question?

Answer 3

What?
the questions are under the thing that says Question:

Answer 4

Oh excuse me, when I looked at the question b4 I dint see any choices. Excuse my mistake.

Answer 5

Oh sorry... that's my fault I didn't know

Answer 6

Are you having trouble with it as a whole, or are there some things you know and have any ideas on?

Answer 7

To be honest the whole thing is just confusing...

Answer 8

Thats okay, I understand. So you do have experience with coordinate plains, and working with points right?

Answer 9

Yes

Answer 10

Do you know the answer?

Answer 11

I dont have the answer, but I do know how to find it.

Answer 12

I can help you along the way, but by no means can I give direct answers

Answer 13

Its one of the rules of the site.

Answer 14

Okay

Answer 15

So lets start with a. Its wants you to put the test number and scores into ordered pairs.
Or X,Y.

Answer 16

Do you know what to do next?

Answer 17

Make them like (1,90) and (2,80) (3,95) Right?

Answer 18

that is correct. Good Job!

Answer 19

So you know how to answer part A

Answer 20

Hooray!

Answer 21

now, lets move on to part b:
If you recall, Domain is just the possible x values for the graph. Do you know how to create that?

Answer 22

mmmmm not really

Answer 23

well, the form domain is often presented in is the lowest x value the variable x, then the high variable. So for some random graph not his one, you could have 5<x<10 where the possible x values must be bigger than 5, but less than 10.

Answer 24

that would be the domain.

Answer 25

so it would be 80 to 95?

Answer 26

well ur on the right track, but those are the y values. Try the x ones.

Answer 27

oooooo okay then it would be 1 to 5

Answer 28

that is correct. So how would you put that into the form mentioned earlier?

Answer 29

1<x<5

Answer 30

that is close, but you must remeber, by these rules x would equal 2-4 not 1 thru 5. You must use the greater than or equal to/ less than or equal tot

Answer 31

so uh it would be uh 1>x>5? I don't think that's right

Answer 32

I'm sorry I don't understand

Answer 33

\[\le \ge \]

Answer 34

these are th signs. Whenever it is equal to it means this number AND the numbers after it or before it, so \[1\le x \le 5\]

Answer 35

that is the domain

Answer 36

ohhhhhhhhhhhhhhhhhhhh

Answer 37

Domain isn't 1≤x≤5 actually, because by saying 1≤x≤5, you are saying that the infinitely smallest number is included as well, which isn't the case. Simply said, there can't be 1.5 of a test.

Instead, the domain would rather be something like this: {x | x = 1, 2, 3, 4, 5}

Answer 38

woah

Answer 39

This isnt advanced mathematics. that is much too technical.

Answer 40

whats ur grade Joemama?

Answer 41

Uh it isn't advanced mathematics, that's just an appropriate set builder notation for defining the domain.

But in layman's, the domain is x=1, 2, 3, 4, 5.

Answer 42

9 thats the only section I found related to math

Answer 43

Not advanced, but this is the way I was taught in the younger grades I didnt get it that refined till later

Answer 44

so which one is it?

Answer 45

well, what did you encounter in the lessons of yours?

Answer 46

how did they show domain?

Answer 47

I'm in algebra but I don't what it looks that way I'm trying to help......

Answer 48

to get

Answer 49

It's not about representing the domain. You can also use interval notation. That's not what I'm talking about.

By using an inequality, you are implying that there is an infinite set of numbers that can be defined as x, as long as it is between 1 and 5. That would not be correct in this scenario. Note that they stated it is a relation which is to be defined as a set of ordered pairs.

Answer 50

You can just say the domain is the set of whole numbers from 1 through 5, inclusive

Answer 51

ight, go with justjm.

Answer 52

ahh thank you
alright time for the next part

Answer 53

the next part indeed.

Answer 54

to find range you must order al lof the x values from least to greatest then subtract the smallest value from the largest value in the set.

Answer 55

okay so 15

Answer 56

well show the whole thing not just the answer.

Answer 57

so 95-80= 15 is the range.

Answer 58

hooray

Answer 59

whats the real answer Justjm? Lets hear it

Answer 60

dont be rude to mr justin

Answer 61

Im not , looking at it that does seem rude, that was not my intention

Answer 62

I think it is asking for the range with respect to the relation, not the statistical range.

Remember that the relation is discrete, not continuous. The range would be the set of y values, or { y | y = 90, 80, 95, 85}

Answer 63

well stop being rude to mr justin hes right and youre not

Answer 64

Chill he's helping out as well.

and how do you know my name?

Answer 65

and no, he wasn't rude. calm down

Answer 66

I see what you mean, I had considered that, bt was trying to think from a 9th-grade perspective.

Answer 67

hm maybe you found out from my username I suppose. Well that was a correct guess ¯\_(ヅ)_/¯

Answer 68

Just go with justjm, his mathematical skills are respectable.

Answer 69

sorry that was my friend i walked across the room so yall sayin the answer would be y = 90, 80, 95, 85?

Answer 70

yes, but ensure to order form least to greatest, for simplicity

Answer 71

^
correct good job

Answer 72

so it would be 80 85 90 95

Answer 73

sorry I keep asking I just wanna make sure its right

Answer 74

correct

Answer 75

and what was the domain again ?

Answer 76

x=1, 2, 3, 4, 5.

Answer 77

okay thank you for the help

Answer 78

It was my pleasure. Let me know whenever you need assistance.

Answer 79

thx! ill make sure to whenever I can

Answer 80

ANd ur welcome to chat in the main chat down below on the bottom right of the page where it says, all subjects. And if you dont mid further, please slect the best response button on the right

Answer 81

of your posts

Answer 82

I will

Answer 83

Again thank you for all the help

Answer 84

your welcome, and thank you

Answer 85

See you on the flip side

Answer 86

diddo

Answer 87

also if you are done with the question, please close the thread.