Texas Instruments TI-84 Plus Silver Edition

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Entering Functions in
Entering Functions inEntering Functions in
Entering Functions in Y=
Y=Y=
Y=
To enter a function in the Y= menu, press Y= and select a line for the equation. Press CLEAR
to delete an equation that is no longer needed. Use Y1 for most problems.
Use the numbers on the keypad to enter coefficients and the X key to enter variables. Even if the
problem uses a different variable, use the X key when using the calculator. For fractional
coefficients, use parentheses, so enter (1/2) for
1
2
.
Use the operation symbols for addition, subtraction, multiplication and division that appear in the
problem. Use (-) for a leading negative rather than subtraction.
To raise a variable to the second power, type X and then press
2
x
. To raise a variable to another
power, such as the kth power, type X and then press ^k. For a square root, press 2
nd
2
x
. For a
different root, such as the kth root, press ^(1/k). Note that the when working with radicals, the
calculator automatically opens parentheses. Take care to close parentheses when needed.
Example: Enter
3 2
2 3
( ) 5 9
3 4
f x x x x
= − − +
on the Y1 line on the Y= menu.
Example: Enter
7
( ) 4
3
x
f x x
x
+
= − + −
−
on the Y2 line on the Y= menu.