 Hello and welcome to the session. In this session we will discuss a question which says that draw a scattered plot for the following table which shows blood pressure with respect to weight and explain whether there exists positive, negative or no relationship between the variables also find the strength of the relationship. Now here in this table blood pressure is given in millimeters of mercury and weight is given in kilograms. Now let us start with the solution of the drawn question. Now here we are given blood pressure and weight and we know that blood pressure depends on the weight of the person. So on vertical axis we will take blood pressure and on horizontal axis we will take weight. Blood pressure is dependent variable and weight is the independent variable. Now in the table you can see that blood pressure varies from 77 to 96 and weight varies from 60 to 110 on horizontal axis on vertical axis up to 110 on horizontal axis and 70, 75, 200 on vertical axis which are given to us in the table. Now as we have taken weight along horizontal axis and blood pressure along vertical axis so different value of weight and similarly blood pressure that is these given values for blood pressure represent different values. Now we have to plot the audit pair x, y on the graph. Now here first of 81 plot this audit pair on the graph. Now this is the point 60 on horizontal axis. Now from this point we will move to reach at the point where the y coordinate is 81, 80 or near 80. So this is the point which represents the audit pair 51. Now the next audit pair that we will plot on the graph. Now 61 will lie between 60 and 70 and just next to 70 point on vertical axis is 77 that lies in between 75 which represents the audit pair and we will plot all the other audit pairs on the graph. So we have plotted on the graph and we are getting this scattered plot for the given data. Now let us see the pattern of this scattered diagram. Now here we can see that most of the points are moving in upward direction so there exists a positive relationship between the two variables where we see that as weight increases the blood pressure also increases also the points are not close to each other. We can say that the points are moving in upward direction but they are far from each other. The strength of relationship is weak therefore there exists weak relationship between blood pressure increase in weight the blood pressure also increases. Now strength of the relationship can also be known with the help of a line. Now if we draw a line informally such that the either side of line has almost equal number of points and paying attention to the closeness of points we get this diagram. Here we see that the points are not very close to the line rather they are away from the line so the relationship is weak. Now here you can see that this line is moving upwards so there is a positive relationship between the two variables that there is a positive but weak relationship between the two variables. So this is the solution of the given question and that's all for this session hope you all have enjoyed the session.