Chapter 1: Operating the TI-84 Plus Silver Edition
24
When you press
y [
, all the expressions and instructions separated by colons are pasted to
the current cursor location. You can edit any of the entries, and then execute all of them when you
press
Í
.
Example: For the equation A=
p
r
2
, use trial and error to find the radius of a circle that covers 200
square centimeters. Use 8 as your first guess.
Continue until the answer is as accurate as you want.
Clearing ENTRY
Clear Entries
(Chapter 18) clears all data that the TI-84 Plus is holding in the
ENTRY
storage area.
Using Ans in an Expression
When an expression is evaluated successfully from the home screen or from a program, the TI-84
Plus stores the answer to a storage area called
Ans
(last answer).
Ans
may be a real or complex
number, a list, a matrix, or a string. When you turn off the TI-84 Plus, the value in
Ans
is retained in
memory.
You can use the variable
Ans
to represent the last answer in most places. Press
y Z
to copy the
variable name
Ans
to the cursor location. When the expression is evaluated, the TI-84 Plus uses the
value of
Ans
in the calculation.
Calculate the area of a garden plot 1.7 meters by 4.2 meters. Then calculate the yield per square
meter if the plot produces a total of 147 tomatoes.
8
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7
y 6 Ë
95
Í
1
Ë
7
¯
4
Ë
2
Í
147
¥ y Z
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