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TI- 84 Graphing Calculator Let the “little people” do the work! Why Use A Calculator? Cheaper than a laptop Students learn visually and hands-on Students are engaged Students are critical thinkers Students are problem solvers Students are 21st Century learners Why teachers use a graphing calculator? Student Objectives Create a scatter plot of a data set Explore the linear model of a data set Slope Y-intercept Find the mean (average) value for a data set Data Collection – “More Students Apply Early” Press Stat, Edit, Enter – Data in Lists (already completed ) Press Stat, Enter and highlight L3 (press up arrow ^ to highlight) • Press 2nd [List] > 7, 2nd [L2] ), Enter Press 2nd, Y= and adjust the settings for the scatter plot. Press Window and set the appropriate values for the data Press Graph Focus Questions What is the average increase in the number of students that are applying early for the time period shown in our data? What is the linear function modeling this data? Focus Questions Continued What does the slope and y-intercept mean in the early decision-year scenario? Predict the total number of students applying for early decision for the period 2004 through 2007. Focus Answers Your scattered plot should show that 6197 students are applying for early decision Y=5908.7857142857X +42998.357142857 slope = 5909 (increase of students/time period y-intercept = 42998 (number of students that applied early in 1997- 98) Back to Questions Page Answers Continued The values shown below are found using the linear model. (refer to Slide #6) Year #of students 2004-05 2005-06 2006-07 Total 84,360 90,269 96,177 270,805