What would you like to do?
How can you use a scatter plot to find an equation of a trend line?
A simple method involves cutting a rubber band. Then the rubber band straight line is stretched over the scatter diagram and moved about until you feel that 50 % of your data …is on one side of the temporary line and the other 50 % is on the other side of the line. Often the data is grouped such that a lot of points fall on the imaginary line of the rubber band and only a few oddballs are positioned well away from the line. We think of this method as the " Best Fit " method, using your judgment to decide the best fitting trend line.
What is the most accurate trend line on a scatter plot showing the relationship between two sets of data?
Line of best fit
it is impossible to find the exact slope of a scatter plot. instead you must find the line of best fit. if you find it with a graphing calculator, it is easy. you go to STAT… then press edit. put the x values in L1 and the y values in L2. to find the line, you press STAT again and right arrow to calc and select LinReg(ax+b) number 4 i think. then enter L1,L2,Y exactly and press enter. if you want to see the equation of a line press Y=. if you want to see the graph, you press graph and if it doesn't show the data, press Zoom 9. then if it doesn't work, press STAT PLOT and select the first one and then turn to ON.
It is easy to find the correlation. First you see how far apart the dots are. if they are going UP like this / …
Draw a scatter plot of the data and dtaw a line that corresponds closely to the data and write an equation of the line?
x 7.1 8.1 3.0 8.5 3.4 … 8.9 4.0 9.6 4.1 9.8 4.8 5.2
You find two perfect points (exactly on a point) and use the formula y2-y1 over x2-x1
to show the relationship between 2 sets of data
When there is no trend!
The line of best fit is simply the line that shows the general direction of the graph. The trick is to make the line go through as many points on the graph as possible. Some s…catter plots have no line of best fit.
use a graphing calculator. chances are, it's not linear; it's probably got some high-degree function with non-whole number coefficients. i think you can download a free graphi…ng calculator online.
scatter plot and line graph
No. When you draw a best line of fit on the scattered plot, the line would not be straight.
Start by putting your ruler following the graphs trend (neg/pos) then either draw the line through as many points as possible or ,preferably with an equal no. Of points on eac…h side of the line
To carry out a preliminary examination of the date so as to discover whether or not there is any relationship between the two variables plotted, and to provide an indication o…f the nature of that relationship (linear, polynomial, quadratic etc). Also to get an indication of how well the data correspond to the relationship (the variability around the curve of best fit).
Scatter plot line graphs are used: In research to see trendsby Actuaries to predict insurance ratesby economist to predict the economy The general idea is to derive a trend o…r general theme for a series of points of data.
Based on the information given in the question, nothing particularly is true. The line need not be straight, or even a smooth curve. There need not be any points on the line b…ut there need not be any points not on it.
Least squares regression is one of several statistical techniques that could be applied.