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TI nspire cx cas Calculator tutorial 4

The tutorial continues to explore features of the Ti nspire cx cas calculator.  The tasks below review features presented in previous tutorials. Also, they introduce basic graphing tools.

16) Graphing -- parabola/quadratic

Tasks: Graph the function:

nspire quadratic function example

Then, identify the zeros (x-intercepts) using tables and graphing tools.

 

"home"  (On)

Select the light blue graph icon on the screen

"enter"

At the bottom of the screen, input the function/equation

x  ^   2 (space)  +    5     x     +    4

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**Cool Feature: as you type in the terms, if you press the right arrow, you can see the progress of the graph!!

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"enter"

The output:  a graph of a parabola

 

Then, to find the zeros:

Method 1:

"menu"

7: Table

1: Split screen table

at -4 and -1, the outputs are 0 in the table (those coordinates are the zeros)

"menu"

2: Table

1: Remove Table

 

Method 2:

"menu"

6: analyze graph

1: zero

press mouse keypad; then, move cursor over the graph (shading the x-intercept), press mousepad again.

the coordinate will appear

 

17) Graphing -- Conic

Task: Graph a circle with center (4, -2) and radius 5

nspire conic circle graph example

"On/Home"   Select the blue graph icon  ("enter")

The display: A coordinate plane

(bypass the empty function and cursor at the bottom)

"menu"

3: Graph entry/edit

2: Equation

3: Circle

1: (x - h)^2 + (y - k)^2 = r^2  (standard form of a circle)

fill in the boxes with h, k, and r values:

left box: 4

middle box:  (-)   2

right box: 5

"enter"

The Output:  Circle centered in the quadrant IV


Note: to identify properties of the conic,

"menu"  

6:analyze graph

8: analyze conics

Move cursor over the conic to see properties

 

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Note: To view the previous graph, press "ctrl", then the left arrow on the mouse keypad!

___________________________________________

 

18) Graphing -- Adding another function

Task: Add the line y = x - 3  through the circle in the graph

The display: Circle graph (from task 17)

"menu"

3: Graph entry/edit

2: Equation

1: Line

1: y = mx + b

In the boxes, input

1  (slope)   and  (-)  3   (intercept/b)

"enter"

The output:  A line intersecting the circle

Then, to find the points of intersection (i.e. the solutions):

"menu"

6: Analyze the graph

4: Intersection

Shade the areas (covering the intersections)

"enter"  (press the mousepad)

The display: coordinates of the intersections appear

 

___________________________________________

**Note: To recall a previously entered function, try the up and down arrows on the keypad to recall saved equations!

__________________________________

 

 

19) Help key and suggestions

Task: Review the features!

"On"  (Home)

"A Calculate" 

Workspace appears

"ctrl"    "trig"   (blue question mark with a circle around it)

Help text appears on screen...

Read and scroll to the bottom...

Then, click "esc" to return to main screen...

 

Then, type "ctrl"  "trig" again..

Another help text appears on screen...

Scroll and read the contents...

 

20) Turn off the unit!

"ctrl" 

"home/on"  button

 

  

 

<< ti-nspire tutorial 3

 

ti-nspire tutorial 5 >>

 

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Graph Icon:

ti nspire x cas graph icon

 

 

Graphing Input Screen:

nspire graphing display

 

 

Graphing Result:

nspire graphing parabola

 

 

 

 

 

 

 

 

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Find more calculator activities in the TI Education Technology pages!

 

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Webcomic #10 - "Clever Lil Devil" (Satan Plays with his new calculator) (12-19-11)  (Click lower right to view)

webcomic 10 little satans calculator

Weekly math comic gallery

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ti nspire x cas screen

 

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