Cheryl Kerr

ALVIN ISD HS Math Coordinator

Spring 2017

TI – NSPIRE REFRESHER

Algebra 1

• Graphing a Relation pg1

• Solving an Expression pg2

• Solving for a variable pg3

• Solving a System pg4

• Roots of a Quadratic pg5

• Linear Regression pg6

Tips/Tricks

TABLE OF CONTENTS

Pag

e1

Graphing a Relation

In the "Graphs" page or document, select

"menu", "Graph entry/edit", "Relation"

rel 1 (x,y) will allow the entry of an

equation in any form

Enter the equation in any form!

Pag

e2

Solving an Expression

Enter an expression

Press CTRL "=" to get the "|"

Enter the value for x and press "enter"

Pag

e3

Solving for a variable

In the "calculator" window, type in

"nSolve" followed by the equation, a comma and the variable you are

solving for

(usually "x")

OR

Choose "menu", "Algebra"

Choose "Numerical Solve"

Type in the equation followed by a comma and the variable you

are solving for

Don’t forget

“,” and “x”!

Make a mistake?

No problem!

Highlight the problem and

press “Enter” (This will copy the problem)

Correct the mistake and

press “Enter”

Pag

e4

Solving A System Of Linear Equations

In the "calculator"

window, Choose the

"menu" button

Choose "Algebra"

Choose Solve "Systems of

Linear Equations"

Enter the number of equations

Label the variables (may

be different than x & y in application problems)

Enter the equations

(in any form)

Press enter.

Note the

exceptions

below.

Answers with “c”

values indicate

“Infinitely many

solutions”

“No solution found”

will appear for

parallel pairs

Pag

e5

Roots Of A Quadratic (Polynomial)

In the "calculator"

window, Choose the

"menu" button

Choose "Algebra"

Choose Solve "Polynomial

Tools"

Choose "Real Roots of

Polynomial" (For Algebra 1)

Beyond Algebra 1, any of the 3 menu

options may be chosen depending

on the solution

Enter the quadratic

equation (no "=")

Don’t forget “,”

and “x”!

Just like nsolve

Pag

e6

Linear Regression

In a new document,

select "menu" and choose "Add Lists &

Spreadsheets"

Enter "x" in Column A and "y" in Column

B.

Enter the values

associated in each column.

Click on a cell in column C (or

beyond)

Choose "menu",

"Statistics" then "Stat

Calculations"

Select "Linear Regression mx+b" or "Linear

Regression a+bx"

Make sure the x-list pulls from the x

column and y-list pulls from the y

column

"Save RegEqn" will store the equation in your graphs page (usually defaults to

f1)

Enter OK

The regression equation will

be listed in the Spreadsheet including the "r" value to determine

strength of the correlation.

"CTRL" "doc" to add a page.

Select "Add Graph"

F1 will already contain the

regression function

Press enter to see the graph

Pag

e7