 Hello and welcome to the session. In this session we will discuss how to graph quadratic equations and power functions using graphing calculator. Here we are going to use TI83 plus calculator. Now let us start with the quadratic equation y is equal to x square. Now this is TI83 plus calculator and we want to graph y is equal to x square on it. First we begin with a home screen and press y is equal to button. Now this takes us to the equation entering screen where we will write our equation. Now let us enter equation x square into y1 for this we press f t theta n key. X will appear and then we press x square button and so we get x square. So here we have y1 is equal to x square. If we want to plot more than one equation then we write the other equations at y2, y3 and so on. But here we discuss graphing of only one quadratic function. So we have put one equation that is y1 is equal to x square. Then to view its graph press graph key. Now on the screen the graph of the quadratic function y is equal to x square will appear on the coordinate axis. We see that it is an upward facing parabola. We can get the better picture of the graph by using zoom feature. So we press zoom key and the following screen will appear. On scrolling down we get more options. We see at 0 zoom fit is written. So we scroll down and press 0. We get the graph of y is equal to x square which fits the screen. Now let us see the trace feature. For this we press the trace button. Now on screen we can see the points which lie on the graph as the cursor is moved. It will give the exact values of the function on the graph. See as we moved to right by pressing this right button we reach this point and on screen the coordinates of this point appear. That is x is equal to 7.23 and y is equal to 52.33. Thus we can graph any quadratic equation on the graphing calculator. Now let us graph a power function. Suppose we want to graph two ways to the power x. We will follow the same steps as for quadratic function. So we start with pressing the y is equal to button. Then we write y1 is equal to 2 raised to the power x and press trace. The curve of y is equal to 2 raised to the power x will appear on screen. If we want to know the coordinates of points lying on curve then we press trace and the following screen will appear. To know the point we move the cursor on the graph. Now see this point on screen shows x is equal to 0 and y is equal to 1. Thus we can graph the quadratic and power functions on TI 83 plus calculator. This completes our session. Hope you enjoyed this session.