 Hello and welcome to the session. In this session we will discuss a question which says that describe the relationship between two quantities by examining these graphs. Now before starting the solution of this question we should know some results and that is upward movement of graph that is here we have upward movement. So this upward movement of graph shows an increase in quantity along y axis downward movement of graph shows decrease in quantity along the y axis. Now these results will work out as a key idea for solving out the given question. Now let us start with the solution of the given question. Now here we have to describe the relationship between two quantities by examining these graphs. Now let us start with the first part. Now in the first figure we are given text on vertical axis and horizontal axis. Now here we see that graph is moving upwards but at different rates it means there is an increase in text when income increases. So here the graph shows that text depends on the income now is less also higher. Now initially from this part of the graph you can see the text increases slowly with increase in income because from the key idea we know that upward movement of graph shows an increase in quantity along y axis. Now from this part of the graph that is from A to B we see that for certain range of income the text is increasing with slightly higher rate then from this part that is from B to C we can observe that with very high income the text increases quickly. Now let us start with the second part. Now in the second part we are given sales on vertical axis and time on horizontal axis. Now here we see that for some period the sales increases then for some time they remain constant and after some time they start decreasing. So here the graph shows the relationship between sales and time and here sales depend on time period. Now from the graph you can see that from part A to B sales increase at study rate with time then in the next part that is from B to C sales remains constant as here from part B to C we have a horizontal line then in the next part that is from C to D we have a steeper straight line which means here the sales increases quickly for some time then from D to E again we have a horizontal line which means here sales remain constant for certain period. Now here we can see that line segment EF is steeper than the line segment FG. It means that sales start decreasing quickly in very less time from E to F and then from F to G sales continue to decrease but at a slower rate. So we have described the relationship between two quantities by examining these graphs and this completes our session. Hope you all have enjoyed the session.