# 20 Most Recent Sentry CA 756 Calculator Questions & Answers

What is the question?
Put your calculator in STAT mode (2-var statistics or regression )
Enter your data in two lists, preferably sorted according to the x-value
Choose a regression model from the ones available and get the calculator to give you the best fit.
However to see which regression model best fits you data you need a graphing calculator to draw the scatter plot, then superpose on the scatter plot the curve of best fit given by the regression model.

Once you accept a model as the most suited one, you can use the equation of the curve to predict a y-value given an x-value (what ever REAL LIFE meaning they might have)
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Sentry CA 756... | Answered on Dec 11, 2013

Press the [a b/c] to toggle from one form to the other.

Sentry CA 756... | Answered on Oct 28, 2013

Use the key marked with an exclamation mark.

Sentry CA 756... | Answered on Oct 11, 2013

Look for a key marked with an exclamation mark.

Sentry CA 756... | Answered on Oct 11, 2013

there should be a button that has an x with a y where the two would be, i believe its above the delete button. that symbol is the same as x^2 (x Squared) except you input whatever you need to as the power in place of y. so hitting x^y followed by a 3 should cube your original x.

Sentry CA 756... | Answered on Mar 11, 2013

You cannot be serious. The digit keys allow you to enter the digits that make up the number you are using in your calculations. +, x, - / allow you to perform an addition, a multiplication, a subtraction, or a division. Keys with x^2, sin, tan, cos, log, allow you to calculate the relevant functions.
You get the idea.
To learn how to use the calculator, read the manual. At least skim through it looking for instructions on how to use a particular task. There is no shortcut.

Sentry CA 756... | Answered on Mar 24, 2012

Look for a key y= (y= editor). type in the right side of the function sin(x), press Draw or graph. After a graph is drawn, and if it is not well centred play with the Windows dimensions, or the Zoom functions.

Sentry CA 756... | Answered on Mar 24, 2012

How to graph a function
Look for a key labeled Y= ( the y= editor) and press it. Use the key pad to type in the right side of the function.
Press Graph to display the graph.
If drawing is out of range set the window parameters. Alternatively (if there is a zoom key) use it to select a ZoomIn, a ZoomOut , Zoom Standard.

Sentry CA 756... | Answered on Mar 24, 2012

To change the angular mode, press MODE, press the digit corresponding to the desired mode, then press EXE.

Sentry CA 756... | Answered on Mar 07, 2012

Press the purple button 'Alpha' after pressing sign, then go down to the "+" sign that has the purple X BELOW it, press it. "X" should have appeared.

Sentry CA 756... | Answered on Mar 07, 2012

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