![]() Now, let’s take the same table, and change up our exam scores a little bit. So, you can see that this line has a positive slope because it’s going upwards, which means that it has a positive relationship. When drawing a line of best fit, you need to draw a line that represents the general, or average, trend between the data points. When both variables are increasing, this is said to be a positive relationship.Īnother way to see what type of relationship we have among our data points is by drawing what we call, a line of best fit. There are a few outliers, like our 3.5 right here and then our 4.5 but over all, we can see that as one variable increases, the other variable also increases. We can see that, overall, as the hours of study time increase, the exam scores also increase. Great! Now that we have all of our points plotted, we are able to take a look at the relationship between the points. (So we go 3, 67’s about right here.) Then we do the same thing for each of our other points. So, for our first point we have \((3, 67)\). We find our first number of data points that lies on the x-axis and go up the corresponding amount on the y-axis. So, plotting points works the same as it would when plotting a line graph. Now, that we have our numbers on each axis, we can begin to plot our points. We know that time is our independent variable because time is always the independent variable, so time will go on our horizontal axis here, and exam scores will go on our y-axis. Then we need to fill in our number lines. So, we are going to set it up exactly like we would a line graph. Let’s take a look at a few different tables of data, see how to graph each, then look at the relationship between the two sets of data. ![]() Hey guys! Welcome to this video on Scatter Plots.Ī scatter plot is a helpful tool that allows us to see the relationship between two variables, or to see that there is not a relationship between two variables.
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