If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content
Current time:0:00Total duration:4:01

Read line plots


Video transcript

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 pot 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 and those and 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 one one person attending the party via 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 this this this partier is age three right over here now I have M ron age five so that's someone that's someone right over here who'd be age five you could think of this dot this represents Imran who is age five then you have Surya who is also age five so he's also H five so that means we have a second we have a second person at the party who is age five so under H 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 a 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 were 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 well how many 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 is our ages and 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 ten eleven and on and on and on and on so let's look at all the dots let's all 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 older than five years old you can do 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 the 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 hopefully you found that interesting