MARY FRANCIS M. LOTERTE[br]LOUIE B. LASALITO

This applet will enable the students to:[br] a.) find the slope of a line given two points[br] b.) identify the trend of the graph[br]

1. Type your desired coordinates of points A and B in the input box.[br]2. Find the slope of a line given two points. If the computed value of your slope is undefined then type either infinity symbol (-∞ or ∞) or question mark symbol "?". The word " CORRECT" will display on the screen if your answer is RIGHT.[br]3. Explore and investigate the trend of the graph using this applet.[br][br]Note: In Geogebra, if the value of your divisor is 0 then the quotient is either infinity symbol (-∞ or ∞) or question mark (?).

1.)The coordinates of points on a graph are given in the form( x,y). What do x and y represent on the graph? Which coordinate of a point changes when the point is moved vertically? Which coordinate of a point changes when the point is moved horizontally?[br][br]2.) Set the y-coordinates of points A and B to the same value while the x-coordinates of points A and B are different. What do you notice about the position of Point A relative to B? What is the value of the slope? Describe the type of line that passes through Point A and Point B.[br][br]3.) Set the x-coordinates of points A and B to the same value while the y-coordinates of points A and B are different. What do you notice about the position of Point A relative to B? What is the value of the slope? Describe the type of line that passes through Point A and Point B.[br][br]4.) Set the x-coordinate of Point B is greater than the x-coordinate of Point A and the y-coordinate of Point B is greater than the y-coordinate of Point A. Does the line have a positive or negative value of slope? Why? Describe the type of line that passes through Point A and Point B.[br][br]5.) Set the x-coordinate of Point B is less than the x-coordinate of Point A and the y-coordinate of point B is less than the y-coordinate of Point A. Does the line have a positive or negative value of slope? Why? Describe the type of line that passes through Point A and Point B.[br][br]6.) Set the x-coordinate of Point B is greater than the x-coordinate of Point A and the y-coordinate of Point B is less than the y-coordinate of Point A. Does the line have a positive or negative value of slope? Why? Describe the type of line that passes through Point A and Point B.[br][br]7. Set the x-coordinate of Point B is less than the x-coordinate of Point A and the y-coordinate of point B is less than the y-coordinate of Point A. Does the line have a positive or negative value of slope? Why? Describe the type of line that passes through Point A and Point B.[br][br]8. How did you find the slope of a line given two points?[br][br]9. What patterns can you make in determining the trend of the graph?