How can you use a scatter plot to find an equation of a trend line?
By finding the line of best fit and using the straight line equation formula.
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There are numerous ways to do this. I think the easiest is to put the data in excel and have excel show the trend line, equation, andcorrelation coefficient. Excel gives you s…everal options to choose for the trend line analysis.. The other way is if it is a linear relationship, you can do the linear regression analysis following the steps listed in the related link. If you are not familiar with regression analysis, it may not be easy for you to follow.
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 /
You find two perfect points (exactly on a point) and use the formula y2-y1 over x2-x1
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.
When no possible relationship between the two variables in question is statistically significant.
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
No, that would be quite unusual if if did, although not impossible.
Scatter plot line graphs are used: . In research to see trends . by Actuaries to predict insurance rates . by economist to predict the economy The general idea is to d…erive a trend or 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.
When a trend line is drawn on a scatter-plot there are 4 points above the trend line about how many points should be below the trend line?
The amount an individual point departs from the trend line is the important feature, not that the number above and below should be balanced. A point that is much further awa…y from the trend line is less likely to represent the process being plotted. Each point is of course quite real, but each are influenced by measurement error, random processes within the experiment, recording (transcription) error, and so on. If most of your points lie on a smooth curve, it is more likely that an outlier is subject to error.