Question about Texas Instruments TI-84 Plus Calculator

# How do you type a piecewise function into the TI-84?

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### k24674

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Here is an asurd example of a piecewise function
Y1=11 for X less than 10
Y1=3 for X in the range [10, 20[
Y1=X+5 for X in the range [20, 30[
Y1=10 for X larger than 30

Here is the screen capture of the Y= editor window.
You have

1. the definition of the function within a domain, enclosed in () followed by the domain enclosed in ()
2. a + to introduce the second piece (definition) (domain)
3. + a third piece (definition ) (domain)
4. and so on.
5. Use the [2nd][TEST] key sequence to access the relational operators, less than, greater than, etc.
Here are two screen captures for the Y= editor and the resulting graph. Yoy have to play with the window dimension to display a clear graph. Note : 3 pluses in equation, 4 pieces in graph. Posted on Mar 19, 2010

• k24674 Mar 19, 2010

Sorry, the + in the definition of the function, (X+5) in the third interval does not count towards the number of pieces.

• k24674 Mar 19, 2010

You can use the logical AND operator in the definition of the limits of a domain. See screen capture below. ×

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× ## Related Questions:

### What is ERR: Domain on thr TI 84 graphing calculator?

The arccosine function is defined for arguments in the range -1 to +1. -125.85/-120.36 is larger than 1 and hence outside the domain of the arccosine function.

Dec 03, 2013 | Texas Instruments TI-84 Plus Calculator

### How do i get inv on my TI-84 Plus caculator

To get the inverse trigonometric functions press the 2nd key then the trig function key. If you'll look at the key legends above the SIN, COS, and TAN keys you'll see the standard math notations for their inverse function.

Apr 05, 2012 | Texas Instruments TI-84 Plus Calculator

### How do i graph an equation on a ti-84 plus silver edition calculator?

1. To graph a function, Press [Y=] to enter the function editor.
2. Type in a legitimate function.
3. Press ENTER to validate the function.
4. Press the GRAPH key to draw the graph.
5. Play with the window dimensions or use the ZOOM feature
to see more of the graph (or less).

Try your settings by drawing the function y= x
If you have problem with Invalid Dimension or other errors, turn the
Statistical Plots OFF.
To do so, press [SHIFT] [Y=] to open the Stat Plots.
Type in the number to the left of the Option PlotsOff. Then press ENTER.

Sep 20, 2011 | Texas Instruments TI-84 Plus Silver...

### How do you type an equal sign on the TI 84 calculator

On these units, the "equals" sign ([=]) is located in the [TEST] menu. This menu is a [2nd] function of the [MATH] key.

This function is used to test if two expressions are equals. To evaluate an expression, simply hit [ENTER].

Good luck.

Mar 01, 2011 | Texas Instruments TI-84 Plus Calculator

### I don't remember how to type a piecewise function into the y= screen so that i can specify i want one graph (.5x+5) from 0&lt;x&lt;10 and the other (10+2x) x&gt;10

Here is an absurd example of a piecewise function
Y1=11 for X less than 10
Y1=3 for X in the range [10, 20[
Y1=X+5 for X in the range [20, 30[
Y1=10 for X larger than 30

Here is the screen capture of the Y= editor window.
You have
1. the definition of the function within a domain, enclosed in () followed by the domain enclosed in ()
2. a + to introduce the second piece (definition) (domain)
3. + a third piece (definition ) (domain)
4. and so on.
5. Use the [2nd][TEST] key sequence to access the relational operators, less than, greater than, etc.
Here are two screen captures for the Y= editor and the resulting graph. You have to play with the window dimension to display a clear graph. Note : 3 pluses in equation, 4 pieces in graph.
The + in the definition of the function, (X+5) in the third interval does not count towards the number of pieces.  You can use the logical AND operator in the definition of the limits of a domain. See screen capture below. Jan 20, 2011 | Texas Instruments TI-84 Plus Calculator

### Im trying to make a piecewise function with more than 10 functions what can i do???

Hello,
You can actually represent all pieces of the function as a single function. There is an exemple in the calculator manual at page 17-4. You can use it to learn how to implement your function.
The relational operators (less than or equal to, etc.) are accessed through the TEST menu.
hope it helps.

Oct 26, 2009 | Texas Instruments TI-84 Plus Calculator

### TI-84 Plus calculator without ~ | or y keys

type 15 then click a button that looks like this^. then 365. Then hit enter. it is like a normal clcutor except with more function. Sometimes you need to use the 2nd and the alpha button to do some functions.

Jan 17, 2009 | Texas Instruments TI-84 Plus Calculator

### The Greatest Integer Function (int)

The greatest integer function (also called a step function) is actually a piecewise defined function with a special definition. The function has the notation f(x)=||x|| or f(x)=[[x]] when it is written, but the TI-83 and the TI-84 designate this function by using f(x)=int(x) and is found in the MATH NUM menu. This function is the greatest integer less than or equal to x. So, f(1)=1 and f(1.4)=1. Since this is a piece-wise function you should use DOT mode.

Mar 21, 2008 | Texas Instruments TI-84 Plus Calculator

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