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Name: _______________________________________ Period: __________ TI-83 Instructions for Graphing Clear Memory: 2nd + 7(reset) 1(All RAM) 2(Reset) Find the Intersection of Lines: Y= [your equation] i.e. Y= 5X+2 GRAPH Y= [second equation] i.e. Y=3X+7 GRAPH You should see in the picture of the lines that they either intersect in the given window, or will intersect (if you continued along far enough) To Zoom Out: ZOOM 3 ENTER Repeat until you can see the part you want to be visible Estimate Intersection: TRACE until you get to the point where they intersect To POSSIBLY get the coordinates of intersection: 2nd GRAPH and find where the coordinates are the same for Y1 and Y2 To Calculate Intersection: 2nd TRACE 5(Intersect) ENTER ENTER ENTER 1.) Graph several lines that are parallel to the line defined by: y=3x + 2 a.) Write the equations you used: ___________________, _____________, ___________ b.) Sketch the picture in the window: 2.) Explore lines intersecting with y=5x. Try y=4x, y=3x, y=2x, …, y=0.5x, y=0.4x, … What do you notice? 3.) What is the equation of the line that appears to be closest to perpendicular with the line y=5x? Name: _______________________________________ Period: __________ Logic and Truth Tables on the TI-83 It is convention to use: 1 = TRUE 0 = FALSE when dealing with truth values on computers and calculators Entering a Truth Table: STAT 1(edit) 1 ENTER 1 ENTER 0 ENTER 0 ENTER (to get first column A) 1 ENTER 0 ENTER 1 ENTER 0 ENTER (to get second column B) nd 2 MODE (gets back to home screen) To generate the conditional: A B, we will use: ~A or B: 2nd MATH RIGHT ARROW (to choose LOGIC) 4 (to choose not) 2nd 1 (to choose L1) ) (to close parentheses) 2nd MATH RIGHT ARROW (to choose LOGIC) 2(to choose or) nd 2 2 (to choose L2) ENTER STO 2nd 3 (to store this value in L3 To view your truth table for the conditional, return to the STAT lists [STAT 1] Understanding that to get A B you must use ~A or B, write what you would have to use for the following statements: Type of Statement Logic Symbols Equivalent statement to enter in calculator Converse Inverse Contrapositive Biconditional 1.) Are the truth tables what you expected to get? What do you notice? 2.) Play around and write down another neat observation that you will be willing to share.