Question

i need math help
i need to know if the charts are fuciton or not

Answer 1

do you know the vertical line test?

Answer 2

Do you know what a function is?

I wouldn't be able to explain it as well nor do I have the time or patience at the moment so I'll direct you to do a little bit of reading so that way you have some basic understanding

https://www.mathsisfun.com/sets/function.html

Answer 3

Do you have an idea what doesn't make a function?

Answer 4

Basically

Every x value has to have 1 y-value

You cannot have one x-value give us back two different y-values

You can however have two different x-values give us the same y-value


The vertical line test is another way to remember all this. If you plot all the points, as long as you're able to draw a vertical line and it doesn't go through two points, then it is a function
Otherwise it is not a function if the vertical line goes through two points

Answer 5

@ramen i dont understand the line test
i just need to know how to read the charts
im pretty sure there functions

Answer 6

You're right

Answer 7

in the vertical line test, it is not a function if any of the points cross each other going downwards. E.g. we cannot have 2 of the same exact x values

Answer 8

so yea ur right

Answer 9

how would i do thoses then

Answer 10

Now we can use the vertical line test

Answer 11

Check out the link I sent, it explains it better with an image

also your question asks you to make a mapping diagram
(Not sure if that's just a tip/hint for you and all you have is a multiple choice yes/no)

Answer 12

vertically, if any 2 parts of the line hit each other, then it is not a function. For the first picture, do you see any parts of the line that contradict each other vertically?

Answer 13

https://www.mathsisfun.com/sets/function.html

Scroll down to where it says vertical line test

If you draw a line in the function, does it cross the graph at more than one point?
If yes, then it's not a function
If no, then it is a function

Answer 14

will let ramen take over

Answer 15

yep read that

Answer 16

so would 5 be not a function and 6 be a functon

Answer 17

yep!

Answer 18

good job

Answer 19

would that be right?

Answer 20

yes

Answer 21

since time is what controlls the number of cookies, that is the x aspect

Answer 22

there are no repeating x's

Answer 23

okay thanks

Answer 24

any idea how to do these
i havnt done any of my math homework since march 13th

Answer 25

do you know Pythagorean theorem?

Answer 26

nope

Answer 27

do you have the formula in your notes?

Answer 28

no

Answer 29

try looking at this https://www.mathsisfun.com/pythagoras.html

Answer 30

ok

Answer 31

do you understand it so far?

Answer 32

with what?

Answer 33

okay so with number one i got c=124
for 2 i got c= 328
for 3 i got c = 168
are thoses right?

Answer 34

how did you get 124 for 1?

Answer 35

so after reading the article, the formula is a^2+b^2=c^2

Answer 36

a and b are the given sides for #1, while c is always the side opposite of the right angle

Answer 37

so for number 1, square a and square b. Add those 2 together. Then take the square root of that answer

Answer 38

yes
i got it by
7^2+24^2=c^2
14 + 48=62
62^2= 124

Answer 39

7^2 is not 14

Answer 40

wait hold up lol

Answer 41

when you square a number, take 7^2 for example, you multiply it by itself again. so 7^2 = 7*7 = 49

Answer 42

same with 24^2

Answer 43

lol

Answer 44

c= 130

Answer 45

try again

Answer 46

7^2+24^2 is the same thing as (7*7)+(24*24)

Answer 47

625

Answer 48

and use your calculator to do the square root function √

Answer 49

Yes! and now take the square root of 625

Answer 50

25

Answer 51

so dos that make the anwers 25 then?

Answer 52

yes!

Answer 53

for number 1

Answer 54

now do the same exact thing you did for the problems WITH C missing. keep in mind C is ALWAYS the side opposite of the right angle

Answer 55

so the other ones are wrong to ?

Answer 56

if A or b is missing, then we can do C^2-B^2= A^2 or C^2-A^2=B^2

Answer 57

yes but now you understand it

Answer 58

so 2 would be 65?

Answer 59

yes!

Answer 60

good job

Answer 61

For #4,5,6 A or b is missing, so we can do C^2-B^2= A^2 or C^2-A^2=B^2

Answer 62

for 3 its 30?

Answer 63

yes!

Answer 64

now you are getting the hang of it

Answer 65

okay so how do i do 4,5,6 cuz im legitly confused

Answer 66

what are you doing???

Answer 67

if A or b is missing, then we can do C^2-B^2= A^2 or C^2-A^2=B^2

Answer 68

just take the square C, then square the other given side, and subtract it from the square root of C, then square root that answer.

Answer 69

hope this makes sense

Answer 70

its kind of like 4+5=9 but 9-5=4

Answer 71

so for 4 i would do 20^2-29^2?

Answer 72

the other way around 29^2-20^2, then take the square root of that answer

Answer 73

for these types of problems, ALWAYS start with C

Answer 74

so 29^2-20^2= 441^2 =21?

Answer 75

YES!

Answer 76

well it is square root of 441 not 441 squared

Answer 77

but the answer is right

Answer 78

okay lol

Answer 79

is that all the help you need?

Answer 80

for now

Answer 81

k good job!

Answer 82

for 5 it givs me a decmil and i not doing right?

Answer 83

@ramen can it be a decimal then?

Answer 84

you should have gotten a whole number

Answer 85

did you do 53^2 - 45^2 then takke the square root of that answer?

Answer 86

lol no i did 54 XD i fixed it
the answer is 28

Answer 87

yes

Answer 88

good job

Answer 89

you don't get decimals for this worksheet, but in differenty problems, decimals can occur which is perfectly fine

Answer 90

and the ANS button on your calculator is very helful

Answer 91

the angle of the problem is weird but that shouldn't matter

Answer 92

29^2-20^2=9801=99?

Answer 93

yes!

Answer 94

good job

Answer 95

you finished the worksheet?

Answer 96

part of it

Answer 97

ok just let me know hen you need help

Answer 98

thats the next part

Answer 99

ok

Answer 100

I would advise making a new post for each new question

Answer 101

oh yea good point

Answer 102

okay