Graphic Calculator. Day 3. Introduction. Familiarize yourself with the graphing calculators and its features. End Products. Basic Skill: Correct Mode. Press the ‘MODE’ button. Windows Dimension. Press ‘WINDOW’ button Select Maximum and Minimum x- and y- values. Y= Key. - PowerPoint PPT Presentation
Graphic Calculator
Introduction
Familiarize yourself with the graphing calculators and its
features
Basic Skill: Correct Mode
Press the MODE button
Windows Dimension
Press WINDOW button
Select Maximum and Minimum x- and y- values
Y= Key
Press the Y= button
Write functions to create pictures
Use your mathematical knowledge
You can use up to 10 equations on the Y= screen
Restricting domain
Sometimes you may only require to graph a portion of the
domain
E.g. The function is y=x2 5 but it is only graphed for x1
Restricting domain
Type in the function in the parentheses, and divide the function
by the restriction in the parentheses
E.g. y=(x2 5)/{x1}
The and symbols are found by hitting 2nd + MATH
Function
Domain
How many curves do you need?
4 Curves
Step 1 - Equations
x
y
4
0
2
What is the equation of this curve?
0
y = - (x+2)2 + 8
Step 1 - Equations
Find the equations & domains of ALL 4 curves and draw your
McDonalds sign
To help you, here are the WINDOW setting:
GC Ex. 1 Solution
EquationDescription1Y = -(X+2)2 + 8 /{X0}Top left curve2Y = -(X-2)2
+ 8 /{X0}Top right curve3Y = -(2X+4)2 + 4/{X0}Bottom left curve4Y =
-(2X-4)2 +4/{X0}Bottom right curve
Step 2 - Turn off the axis
2nd + ZOOM (FORMAT)
Step 3 - Shading
2nd + PRGM (DRAW)
7: Shade(Y3 ,Y1)
Y1: bottom Y equation, Y3: top Y equation
Press VARS, move to Y-VARS menu
Press 1: Function
Choose the equation
Step 4: Enter text
2nd + PGRM (Draw)
0: TEXT
(ALPHA followed by
letters)
Step 5: Storing picture
2nd + PGRM (DRAW)
Use the arrow key to move to STO menu
1: StorePic
Key in a number from 1 to 9
Press Enter
Step 6: Recalling picture
2nd + PRGM (DRAW)
Use the arrow key to move to STO menu
2: RecallPic
Key in the number where you store it
Press Enter
GC Ex 2
Try it on your own
Tips
To restrict domain on both sides
Use the and function
2nd + MATH (TEST)
Use your arrow key to move to LOGIC menu
1: and
E.g. -(X + 2)2 + 8/(X0) and (X10)
Tips
To draw the Sun
Equation of the circle: X2 + Y2 = r2
Drawing a straight vertical line
Vertical lines cannot be graphed in function mode
However, a very steep line can be produced
What is y=x?
Now, what is y=50x?
