# Why is a best fit line used to find slope instead of using the data points?

Because the data points are generally **not** all in line
with each other. If you connect the dots,

from one data point to the next and then to the next, you usually get a zig-zag line of many

segments, where the slopes of the segments are all different and cover a wide range. It would

be impossible to decide what the "real" slope of the data is. The "best fit" line is a line that finds

the pattern buried in the zig-zag data, giving each data point its best share of determining the best

single equation to represent the whole batch of points. That's why it's called "best".

### How do you find the equation for the line of best fit?

There are many ways, but probably you aren't in a statistics class, but in an algebra class. Step 1 plot all the data points on a coordinate plane graph (x-y graph) Step 2 estimate a line 'close' to points. Step 3 use 2 points ON THE LINE (these do not need to be data points) Step 4 find slope of line using points from step 3 Step 5 use point-slope formula to write the equation.

### When you compare two variables how does that turn into slope?

Suppose you have a sample of n points for two variables: (x1, y1), (x2, y2), ... (xn, yn). Without going into various statistical considerations (which are nonetheless important) you can estimate the slope of the 'best' line that can be used to estimate the values of y from the values of x using for formula given for beta-hat in the wikipedia article for simple linear regression.

### What is an easy way to level up your gags on toontown?

Best way to train gags is in cog buildings, because there are plenty of cogs to train gags with. Best with invasion because double points. ( for example if you use a lvl 5 gag when in 5th floor you will normally get 15 points but instead you get 30 which is a good thing. ) Note : Too bad toontown cant extend the points more than 200 points because thats the max points you…

### What is the best method for measuring river gradient?

Take the elevation from an upstream point on the river and the elevation from a point downstream on the river. Calculate the difference in the two elevations. Measure the distance between the two points by tracing the path of the river. Divide the difference in the two elevations by the distance between the two points in order to get the slope of the river, or the river gradient.

### What best explains how a plot of concentration vs time for a reactant of a chemical reaction can be used to determine the instantaneous rate of a reaction at time equals 300 s?

1) Find time = 300 s on the curve. 2) Draw a tangent line crossing the point at time = 300 s on the curve. 3) Identify two points on the tangent line and use them to find the slope of the line. 4) The slope of the line is the instantaneous reaction rate in M/s. 1) Find time = 150 s on the curve. 2) Draw a line tangent to the point time =…

### What is the best reason for using iron filings instead of an iron nail in a chemical reaction?

The best reason for using iron filings instead of an iron nail in a chemical reaction process would be that the filings would take less time to dissolve, because they are already in the smallest solid form they can be in. They are also more likely to have been stored in such a way that they are not contaminated by rust or other pollutants.

### What is the best freebie website?

The best site is prizerebel. All you have to do is take surveys and you get points for it. these points are like cash and you can use them to get free stuff. You can get stuff off of amazon and ebay! Because of this you are not limited in the prizes you can get. You can get almost anything you want! I have been using this site for a long time and its a…

### Make best use of technology to work in an efficient way?

To make best use of your technology you will first need to get to know it, find out all the features and limitations. Knowing every feature and limitation will allow to make the best out of the peace of technology that you own, something productive, for example, instead of playing games you can make them; instead of using social networks you can develop one.

### What is the rule for graphing lines when in y intercept form?

If you mean slope - y intercept form ... Y = mX + b, where b is the y intercept and m is the slope ... b is a point on the y axis --- 5 becomes the point (5,0). m is a slope best thought of as fraction. 3 becomes 3/1 ... to be used as 'rise' and 'run' ... rise tells how far to go up (if positive) or down (if negative)…