Lesson video

Hi, everybody.

Welcome back to your unit on data.

Today we are going to be constructing our time graphs.

So let's get started.

Put on your hats tighten those ties and tell the computer, now I'm a mathematician.

Great.

Let's get started today's lesson.

For today's lesson you are going to need the following resources.

You'll need a pencil, a piece of paper, and a ruler.

Please make sure you have those in front of you and if not pause the video and go get them.

Great.

Let's get started.

Here is our lesson agenda today.

We are first going to look at our Star Words before looking at Leo versus Angela.

We're then going to do question time and then it'll be your end of lesson task.

So here are Star Words! So today we are looking at time graphs.

We're going to be comparing reading scales looking at data.

We have our axis.

We have our horizontal and our vertical.

Leo has decided to cycle the same 20 kilometre route again.

This time, however, he's going to race Angela.

They decided to both record their journeys so they could compare their speeds at different times.

These were their results.

On the left hand side, we can see Leo's cycling times and on the right, we can see Angela's cycling times.

So in the first five minutes we can see Leo has cycled two kilometres, 500 metres.

And then we can see Angela's actually cycled a little bit further.

She's done three kilometres.

It's not until 11:50 that Leo catches up and they're both on 11 kilometres.

And then he takes over.

So he 12 kilometres at 11:55 and she's 500 metres behind, 11 kilometres, 500.

Must've been a very intense race.

At 12:15 Leo finished the race and had cycled the whole 20 kilometres where it took another five minutes for Angela to cycle the 20 kilometre.

So Angela and Leo are unsure about how to present their results so they can be easily compared.

Leo wants to create two separate graphs so it'd looked like this.

Is that easy to compare? Having to go between the two? Not really.

It's not the most efficient way.

Whereas Angela wants to put the information for both of them onto one graph.

So here we have both of them here and she's done different coloured lines.

Why has Angela joined the crosses up with a line? Well, this makes it easier for us to read because then we can predict how far she has got at certain times.

And it's interesting because you can see right at the beginning, where the two of them were neck and neck in the race.

For your independent task today use this data and draw your own time graph which shows both Angela and Leo's times.

Make sure you use a ruler and a sharp pencil and use an appropriate scale.

For the times, it goes up in five minutes but what are you going to choose for the distance? Remember, it's got to go from zero all the way up to 20.

Don't forget to pause this video and use the data in front of you.

Super job today everyone.

If you'd like to, please ask your parent or carer to share your work on Twitter tagging @OakNational and #LearnwithOak.

I really enjoyed today's lesson and I hope to see you again soon.

Bye!.