the table below shows the population of New London County, Ct from 1950 to 2000.
year population
1950 145,000
1960 186,000
1970 230,000
1980 238,000
1990 255,000
2000 259,000
-how do i make a scatter plot of the data?
-predict the population in 2010. explain.
Making a scatter plot is about the same as a line graph. Except you plot your points and then draw a straight line. Your line may not hit any points. The year would go on the bottom. I would go by 10's. The side of the graph would be the population. I would go by 50,00. Now by doing that you have to break the graph, because the data is clustered. To find the population in 2010 you follow the line to that year. Its sounds confusing, but I hope this helps.
With the year on the abscissa (X-axis) and the population on the ordinate (Y-axis), enter the data on your scatterplot. As Jennifer suggests, use a "line of best fit" to estimate the population of 2010.
I searched Google under the key words "correlation 'line of best fit'" to get these possible sources:
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http://illuminations.nctm.org/ActivityDetail.aspx?ID=146
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In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.
I hope this helps a little more. Thanks for asking.
To make a scatter plot of the data, you would need to plot the population values on the y-axis and the corresponding years on the x-axis. Here are the steps to create the scatter plot:
1. Create a coordinate system on a piece of graph paper or in a graphing software of your choice.
2. Label the x-axis as "Year" and the y-axis as "Population."
3. Mark the years 1950, 1960, 1970, 1980, 1990, and 2000 on the x-axis evenly spaced apart.
4. Plot the corresponding population values on the y-axis, using scale and increments appropriate for your graph.
5. Place a dot at the intersection of each year and its corresponding population value.
To predict the population in 2010, you can notice a general trend in the data and use it to make an estimation. By observing the population values from 1950 to 2000, we can see that there is a gradual increase in population over time. One way to estimate the population in 2010 is to assume that this trend continues.
To make an estimation, you can calculate the average change in population for each decade. From 1950 to 1960, the increase was 41,000, from 1960 to 1970 it was 44,000, from 1970 to 1980 it was 8,000, from 1980 to 1990 it was 17,000, and from 1990 to 2000 it was 4,000. Taking the average of these values, we can estimate the average annual increase in population to be around 22,800 people.
To estimate the population in 2010, we can add this average annual increase to the population in 2000. Therefore, the estimated population in 2010 would be 259,000 + (22,800*10) = 259,000 + 228,000 = 487,000.
Please note that this is just an estimation based on the given data and assumes that the trend continues without any significant deviations.