Asking questions about data in a graph
About this video
This video reads a bar graph of the favorite art mediums of students in Mr. Diego's class. It explains the title, the categories and the scale, then decides which questions the graph can answer. The graph can tell how many chose a medium and compare amounts, but not why students like something.
You'll be able to
- read the title, categories and scale of a bar graph.
- use a bar graph to find how many and how many more.
- tell which questions a graph can and cannot answer.
Key words
- medium
- The type of material you use to make art, like paint, pencil or clay.
- bar graph
- A graph that uses bars to show how many are in each group.
- scale
- How much each line on the graph goes up by, such as 1, 2 or 4.
- title
- The name at the top of a graph that tells what it is about.
Transcript
- [Instructor] We're told the students in Mr. Diego's class explored different art mediums. Afterwards they shared which art medium was their favorite. So here it says favorite art medium, so that's the title of this bar graph here. And they give us the different mediums.
Is it media or mediums? Well, they tell us the different media mediums that they're using to construct the art. A medium is just what type of material are you using to produce that art? So painting, you're using paint. Drawing, you're using pencil and paper. Sculpting, some type of clay.
Collage, you're cutting things up and you're gluing it together and in a mixed way. And then on the vertical, going up and down here, we see the number of students. So each of these lines right over here, we increase by one. So the scale, sometimes you'll hear that word is one.
You'll definitely see other graphs where every time you go up by a line you're actually going by two or four, some other numbers. So it's very important to keep track of that. But now let's look at the question. Which questions can be answered using the scale of this graph.
Alright, it tells us to pick two answers. So why don't you read these and pause the video and try to answer this before I do it with you. Okay, let's do it together. So let's see if this one is something we can answer. How many students chose collage as their favorite art medium?
Well, we can see very clearly if we look at the art medium collage that exactly seven students chose that art medium, so I can definitely answer that question. Why do students like drawing the most? Well, this doesn't tell me anything about why students like drawing.
They just say which art medium they liked or is their favorite. And drawing is, it does seem to be the one that the most students wanted to use, but it doesn't say why they like them, so I'm just going to rule this one out. I'm guessing I'm going to pick this one cuz I need to pick two, but let me see.
How many more students chose painting than sculpting? Well, we can see that painting has eight students, sculpting has six students. And the difference over here, this is two between painting and sculpting, so we can definitely answer that as well.
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