Technology Appendix - McGraw-Hill Ryerson

Function or TaskintersectKeystroke(s), Menu, or ScreenYou can use the intersect function to find the point ofintersection of two lines or curves.Example 1:Turn off all STATPLOTs and clear all functions under Y=.Set the standard screen using Zstandard. Return to thefunction entry screen using the Y= key and enterY1 = 2x + 3 and Y2 = -3x + 1. Press GRAPH. Your screenwill look like this:Press 2nd TRACE to access the CALC menu, and select5:intersect . You will get a screen like this:Ensure that the flashing cursor is clearly on one of the lines. Ifit is not, use the arrow keys to put it there. Press ENTER.Ensure that the flashing cursor is now on the other line. If it isnot, move it there. Press ENTER.Next, use the arrow keys to move the cursor as close as youcan to the observed point of intersection, and press ENTER.If your guess was close enough, the calculator will find thepoint of intersection and display its coordinates. In this case,the answer is x = −0.4 and y = 2.2.This procedure will also work with other functions. If there ismore than one point of intersection, find them one at a time.Top MenuMHR • Mathematics of Data Management Appendix B (Revised 2010) Page 16 of 129