Question about Texas Instruments TI-84 Plus Calculator

# Is there a way to search a table for a specific value of x or y on the TI-84 Plus. For example, if I graph a function and want to know the y value for this function is when x=1000, is there an easier way to find this value than taking the time to scroll all the way down to x=1000 in the table?

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• Texas Instru... Master

There are two ways you can do that.

Graphically:
Once the graph is drawn you can use the trace function b y pressing TRACE. With the right and left arrows you can move along the curve. The cursor will move by increments of Delta X, so some points you may be interested in may not appear.
To remedy the situation you can just type in a value of X that is inside the range Xmin , Xmax and press ENTER and the calculator will display the corresponding Y value. This will work only for points inside the interval Xmin, Xmax.

NUMERICALLY
To obtain Y-values outside the Xmin, Xmax interval you can use the fact that Y1, for example, is already defined, and ask the calculator to find a Y-value for you.

Say you want Y1 for X=1000.

1. In main computer screen you type in 1000 [STO

Posted on Oct 05, 2010

• k24674 Oct 05, 2010

There are two ways you can do that.

Graphically:

Once the graph is drawn you can use the trace function b y pressing
TRACE. With the right and left arrows you can move along the curve. The
cursor will move by increments of Delta X, so some points you may be
interested in may not appear.

To remedy the situation you can just type in a value of X that is inside
the range Xmin , Xmax and press ENTER and the calculator will display
the corresponding Y value. This will work only for points inside the
interval Xmin, Xmax.

NUMERICALLY

To obtain Y-values outside the Xmin, Xmax interval you can use the fact
that Y1, for example, is already defined, and ask the calculator to
find a Y-value for you.

Say you want Y1 for X=1000.

1. In main computer screen you type in 1000 [STO>] [X, T, theta,n] [ENTER]

2. Calculator echoes the value 1000.

3. Press [VARS][right arrow >][Y-Vars][1:Function]

4. A list of Yx variables is displayed.

5. Select the one corresponding to the function of interest, say Y1, and press ENTER.

6. Variable echoes on main screen as Y1.

7. Press [ENTER] to calculate it at the value you stored in the variable X (1000).

8. If you want another value, just repeat the steps starting from storing a value in X etc.

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Posted on Jan 02, 2017

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Enter the function using the Y= editor. Pressing [ 2nd ][Graph] (table) will display the table. You can then press [GRAPH] to see the grapg. If you want both graph and table side by side use the split screen feature.
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### The X-Values in the Table for a graph wont reset, i have deleted the equation and there is no graph plotted, however they wont disappear. Also, i tried accessing the X on the top of the table, and it did...

What are you trying to do? You drew a graph, then you cleared the function graphed and went to the table to see if the X values have disappeared and they did not.Right?

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Put the calculator in radian mode and it will graph trig functions just fine. If you don't know how to change it to radians, then go to mode and cursor over to select radians. I am assuming you know where the sine, cosine, tangent, etc. keys are.

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Try pressing the "On" button a couple times. That should work

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