# Introduction to line plots | Measurement and data | Early Math | Khan Academy

– [Voiceover] Let’s say

we’re having a birthday party and these are the kids

at the birthday party. And all the kids, they have

a bunch of different ages, and what we are curious about is how many kids of each age do we have? Well, to help think about that, we can draw what is called a line plot. And I’ve always viewed the

term line plot a bit confusing because in my brain

you use a lot more dots than you use lines, but let’s

look at what a line plot is. So what I will do is I will draw, I guess this involves

a line right over here, I’ll draw a line down here, and then I’ll create buckets

for each of the ages. So let’s see, I have

students here from age three all the way to age seven, so I could say age three, age four, age five, age six, and age seven. I don’t have to go to two, or

I don’t have to go to eight. There aren’t any kids in those ages. Although, I could if I want. And then I look at, well, how many kids do I have of each age? Well, I have one person attending the party, Diya, she’s age three. So I would put, I might put an X here, or I could put a dot here. Different line plots would

put different things here. But that shows me that I have, this partier (chuckles) is

age three right over here. Now I have Imran, age five. So that’s someone right over here who’d be at age five. You could think of this

dot, this represents Imran, who’s age five. Then you have Surya, who’s also age five. He’s also age five, so that

means we have a second person at the party who is age five. So under age five, we now have two people. This is Imran and this is Surya. Then you have Jasper, who is six. So that’s one person who is age six. Then you also have Vikram, who is age six. Whoops, let me do that in that same color. We also have Vikram, who is age six. So let’s put him in the age six bucket. Then we have Luke, who is seven. Luke, who is seven. So that would be a dot right over there. And then finally I have

Anya, who’s also age six, who is also age six. So just like that, I was

able to take all of the data that I have in this table, and I’m able to put it on this line plot. And the reason why this

line plot is useful is it helps us look at, well, how many of each age do we have? It might be a little bit more confusing to just look at the table here because when you look at the

line plot, it’s very clear. Hey look, there’s no one

here who is age four. And look, we have the most

people who are age six. And if we asked ourselves a question, if you didn’t even have this. Actually, let me just even take it away. If we didn’t even have that there, if we didn’t have the table

and we just had the line plot, and if someone said hey look, you know, these are ages right over here. This has our ages in years old, and each dot represents a

student who’s at the party. So based on this line plot, how many people are more

than five years old? Well, you could look at

this and you could say, okay, more than five years old. That would be six years

old or seven years old. It’s not showing anyone who’s eight, nine, 10, 11, and on, and on, and on, and on. So let’s look at all the dots. Let’s look at all the dots here that are more than five years old. There are three six-year-olds and there’s one seven-year-old. So there are one, two, three, four people who are old than five years old. You could go the other way around. You could say how many people

are less than five years old? Well then you could say, okay, less than five years old would be either three years old or four years old. And when you look at those dots, you see there’s only one dot. Only one person attending the party is less than five years old. Hopefully, you found that interesting.

Your videos are so helpful but would it be possible to make your website more like international for example, I live in the uk and I have no idea what it means when it says things such as "pre-algebra" as although we do algebra, we do not call it that. Thanks just a suggestion 🙂

A pie chart can have greater visual impact when representing more disparate quantities. A common histo-gram (compressed bar graph) is easier if ur colors r limited.

Could you do a video about proportionality theorem-BPT,Converse of BPT,parallel proportionality please? Thanks

You have taught me in 3 minutes before what I couldn't learn in 3 hours. Thank you.

What program does he use for these videos?

Hey Guys! We are a group of instructors here to teach anyone who wants to know more about biology, chemistry, physics, and calculus. It would mean a lot if you could check us out.

Thanks,

a3academy

Thanks For Introducing Me To Line Plots.

Thank you so much Sal Khan. I very appreciate your videos. I am having a lot of trouble in math, but you make my math life sooo easy. Thank you sir. Keep up the great videos. 🙂

I love this video and the other video because it explains things much better and u can play it over how many times u want!!!!!!!

Hi Sal Khan,

I want to know how to make a black background? I have tried so much to do it. I am just a student of 6th grade but still I want to know, please reply!!!!!

He is so dumb

Sal you put age 4 and there are no kids in that age

Sal again you put age 4 and there are no kids in that age

thank yu brvh

it is asme

Hi

cooi

Thanks you so much

thanck you so much

hey dyl

-_-

nice

😮 no 🙂

:l

noice

37th comment lolllllllllllllll

Your voice is easy to listen to. I'm really liking Khan Academy. Appreciate all the work you do!

THANK YOU

mashala

You messed up line plots

Replay 2:36

This helped me a lot with my line plot!X3

I also do Khan Academy at my classroom!My friends hate Khan Academy but I love it!X3

Wow EASYIER THAN PEOPLE MAKE IT SEAM THANKS KHAN

thank you

your good

THANK U

Nice dude

Wow might

I've got the app Khan academy.

Thank you for this video my homework is do tomorrow and this is my homework… Line plotS

im 8

I need to know more about this

you are using a Apple computer! 😏

khan academy is 💯

Hi I like your video and if you can ceep on going making a kids dance

hello

amazing 10/10

btw i dont want to do this again

you are making math easy thank you sooooo much

😪😪😪😪😪

This would be really easy

A Line Plot

0:30 Line

X or •

Far better than ixl explains well

Oh Sal Khan, how much I love thee!!!

You saved my life! I forgot to study and this is last minute!

You're the best Sal