 ## 字幕列表 影片播放

• - [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

A1 初級

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

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林宜悉 發佈於 2021 年 01 月 14 日