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← Indicates continuation of a range smaller than a in the inequality
x<a, or a range less than or equal to a in x≤a.
→ Indicates continuation of a range greater than a in the inequality
x>a or a range greater than or equal to a in x≥a.
Indicates that this value itself (in the case of an equation) or
inclusion of this value (in the case of an inequality).
Indicates non-inclusion of this value (in the case of an
inequality).
(2) x-axis. This shows the center and either end values.
(3) Shows the equations or inequalities of the currently selected number
line (the number line displayed in bold). To display a different number
line expression, use
and to move the bolding to the number
line whose expression you want to view.
6. To change the expression, display the number line graph screen and
then press .
• This returns to the expression registration screen. You can change
only the values of a registered expression, or you can re-register
another type of expression. For information about how to do this, see
"Modifying a Registered Expression" (page 88).
7. To exit Number Line, press on the expression registration screen.
• This clears the registered expression and returns to the Math Box
menu.
Important!
• If you change the Angle Unit setting on the SETTINGS menu, all expressions currently
registered in Number Line will be deleted.
Modifying a Registered Expression
To modify a registered expression
Example: To change the expression in Line C (-2.0<x≤-0.5) to -1.5<x≤0.5
1. On the expression registration screen, select Line C and then press
.
2. On the menu that appears, select [Edit] and then press .
3. Input -1.5 for a and 0.5 for b.
((-))1 5 0 5
4. After making sure that [Confirm] is selected, press .
To re-register another type of expression
Example: To change the expression in Line A (x≤-1.5) to x=-1.5
1. On the expression registration screen, select Line A and then press
.
2. On the menu that appears, select [Define New] and then press .
3. On the expression type list that appears, select [x=a] and then press
.
88
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