Why dots? by scane

Mrs. Cane

scane — 2013-11-14 15:50:26 UTC

Ryan

2013-11-14 15:54:45 UTC

We use dots instead of connecting them together into lines because the "linear equation" shows that all the plots on the graph, lie on the same line. Certain numbers don't connect because they aren't part of the domain and it would be pointless to connect the dots. For example, 2 1/2 doesn't go with the domain w.

Teddy

2013-11-14 15:55:00 UTC

When you are depositing money on a weekly basis the dots on your graph will go up and to the right. The reason why we use dots is for you wont deposit anything more then lets say five dollars and you will only do it once a week so if you did a line it would be like saying that you deposit different amounts of money everyday, which you dont, so use dots.

Marissa

2013-11-14 15:57:51 UTC

They didnt use lines beacuse the interval w is whole numbers, and because numbers such as 2 1/2 woudn't make sense since they aren't in the domain of w (whole numbers).

Kerry

2013-11-14 15:57:54 UTC

Because when you connect the dots on the graph, you are saying that all the numbers the line goes through is a solution. A number like 2.5 might not be a solution.

Viktor

2013-11-14 15:58:01 UTC

The dots are used because although the graph shows deposit over time, she does not deposit money every second. Instead, she deposits money at certain points in time, which is why the dots don't have the connecting lines.

Jared

2013-11-14 15:58:15 UTC

The reason they don't use a line and only dots is, because she is only putting 5 dollars in at different times, not forever

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2013-11-14 15:58:15 UTC

RYAN

2013-11-14 15:58:19 UTC

The dots are used because even though that we are depositing money every day, there would be a line connecting all of the dots if we deposit money at every single chance we can get.

a number like 3.5 can not interlock with a whole number like 7.

Michael

2013-11-14 15:58:29 UTC

The reason that you dont connect the dots is that not all the nubers are in the domian of

Amos

2013-11-14 15:58:29 UTC

The points on the graph are not connected because there are no numbers that are meant to go inbetween the the points on the graph.

Kate

2013-11-14 15:58:30 UTC

The book did not draw a line on the dots because the "linear equation" shows that all the plots on the graph lie on the same line. Certain numbers don't connect because they aren't part of the domain and it would be pointless to connect the dots. For example, 2 1/2 doesn't go with the domain W here was not any number that could be used.

Evan

2013-11-14 15:58:32 UTC

they do not make lines in between the dots becuase numbers such as 2 1/2 are not in the domain of w.

Sami

2013-11-14 15:58:47 UTC

There were no lines connecting the dots because it is easier to read the graph

Robert

2013-11-14 15:58:52 UTC

The dots aren't connected because they didn't deposit the money continuously, they deposited the money once at a time

Hiro

2013-11-14 15:59:47 UTC

because she won't pay forever

Will

2013-11-14 15:59:55 UTC

we use dots because not all numbers are on the domain, not all numbers are graphed

Andrew

2013-11-14 19:02:10 UTC

The dots are not connected because it is not one continus payment she makes payments once a week and that is shown by the dots. There are not payments that are happening between the dots that is why nothing is shown. She is only making payments of 5 dollars

Tim

2013-11-14 19:05:14 UTC

Dots are used instead of a line because if there is a straight line, parts of the line that the line go through will not make any sense towards the graph.

Claire

2013-11-14 19:05:18 UTC

We use dots because she does not deposit the amount in between the dots. If there was a line it would show that she was depositing at $11, $12, $13 and so on, which in not true.

Brian

2013-11-14 19:05:20 UTC

there is no line because she does not deposit any money not in between each week or domain so they are not connected by lines and not every number is a part of the graphed data

Eddie

2013-11-14 19:05:34 UTC

Dots were used to do this graph because it dosnt maks sense to connect to points that are not whole numbers that are not in the domain of w. They would use the dots to graph this because there can only be multiples of five in here account.

Tony

2013-11-14 19:05:36 UTC

We use dots because it doesn't make sense to make a line. This is because Beth will never deposit an amount lower than or greater than 5 dollars. Thus, she will not have a line because she will never have anything other than a multiple of 5. She will never have anything like 10 1/2 so it would make no sense to graph it.

Also, Beth will probably not be putting in 5 dollars in for the rest of her life. The line wont continue forever and hasnt started in the begginning of time.

Matt

2013-11-14 19:05:42 UTC

I also think that we used plotted points instead of lines because the plotted points were plotted spescifically for the point itself, not any thing in between each point. There is no possible points between the original points. I think that the lines would mean that there would be a possible point between the points. This is not possible.

Grace

2013-11-14 19:05:45 UTC

They used dots instead of a straight line on the graph because each dot represented a specific point. The pattern was that each week she added 5 dollars to her account. Since there was never a time when she was adding less than 5 dollars, randomly, then a line would not apply. A line, instead, would imply that she was adding random amounts of money at random times. Since there is a consistent pattern, the dots show that they are on the only point possible each week.

ella

2013-11-14 19:06:02 UTC

the reason they dont put it with a line is because she only adds 5 dollars every week. not 3 or 2. so the reason the graph isnt drawn with a line is because a line hits every point inbetween the 5 dollars while but we only need/have the 5 dollars to add each week.

Spencer

2013-11-14 19:06:37 UTC

We don't always use lines to connect the points because not all the nunmbes in between the plotted points apply to the data that has been graphed.

Brian

2013-11-14 19:11:21 UTC

Mallory

2013-11-14 19:14:00 UTC

The graph doesn ot make a line because, as opposed to showing a linear trend or progression with many points in between, the graph is portraying a few selct points within a domain, or any unit. By making a line, that would be showing the points are continuous, yet independent events. In addition, all of the points between each dot will or may not occur.

Caroline

2013-11-14 19:18:17 UTC

They wouldnt use a line graph because she only deposits $5 a week not like $12 or $13 it counts by 5

Mike

2013-11-14 19:18:33 UTC

We use dots because not all the numbers on the graph are in her bank account