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  • - [Instructor] We are told that for four days

  • you record the number of hours you sleep each night.

  • You round each time to the nearest 1/4 of an hour.

  • And then here on this table they tell us

  • that our different days,

  • they tell us how many hours we slept.

  • Day one we slept seven and 1/4 hours,

  • day two seven and 3/4,

  • day three seven and 3/4,

  • day four eight 1/2 hours.

  • Then it says, create a line plot

  • that shows all of the measurements

  • on the number line below.

  • And it says click above the tick marks to add dots,

  • click on tick marks to remove dots.

  • So we can see if I click right over here,

  • a tick mark shows up.

  • And if I click again, it gets removed.

  • So let's see, day one you slept seven and 1/4 hours.

  • So, that's one day where you sleep seven and 1/4.

  • So, seven and 1/4 is right between seven and seven and 1/2.

  • So that's right over there.

  • There we go.

  • On day two you sleep seven and 3/4 hours.

  • So, that's 1/4, 2/4, 3/4.

  • So that's day two.

  • Day three you also sleep seven and 3/4 hours,

  • so that's another day that you sleep seven and 3/4 hours.

  • And then on day four you sleep eight and 1/2 hours,

  • which is right over there.

  • And so, here we go.

  • We have created a line plot

  • that shows all of the measurements.

  • On one day, day one it was,

  • I slept seven and 1/4 hours.

  • There were two days where I slept seven and 3/4 hours,

  • and there was one day where I slept eight and 1/2 hours.

  • Let's do another example.

  • Amy ran many miles during September.

  • She recorded how long it took her to run each mile,

  • rounded to the nearest 1/4 of a minute on the table below.

  • We can see it right over here,

  • actually let me move my window a little bit

  • so you can see everything.

  • And then it says, create a line plot

  • that shows all of the measurements on the number line below.

  • All right, so three times she was able to run a mile

  • in eight and 3/4 minutes.

  • So, there are three that were eight and 3/4.

  • Notice, this is, if we look at the space between

  • eight and nine, there is one, two, three,

  • four equal intervals.

  • And so, 3/4 is going to be three of those.

  • One, two, three.

  • She ran a mile in eight and 3/4 minutes three times.

  • That's what we saw from that table.

  • So, that's three times she did that.

  • She ran a mile in nine and 1/4 minutes two times.

  • So nine and 1/4.

  • That is 1/4 of the way to 10,

  • we can see 1/4, 2/4, 3/4, 4/4.

  • So nine and 1/4 she did two times.

  • So that's going to be one, two.

  • And then let's see, nine and 1/2

  • she did four times.

  • Nine and 1/2 is here, so one, two, three, four.

  • And then eight and 1/2 she did one time.

  • So that's eight and 1/2 right over there.

  • And then she ran a mile in nine minutes five times.

  • Nine minutes right over here.

  • One, two, three, four, five.

  • And we're done.

- [Instructor] We are told that for four days

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A1 初級

用分數數據製作線圖 (Making line plots with fractional data)

  • 1 1
    林宜悉 發佈於 2021 年 01 月 14 日
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