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Storing Functions

u To store an x = equation

Example: To store x = 3y in line x4

(1)On the Graph Editor window, tap [Type] and then [x=Type] to specify an x = equation.

(2)Tap the box to the right of line number “x4”, and then input the equation:

3y.

(3)Press Eto store the equation.

u To store an inequality

Example: To store the inequality y > x2 – 2x – 6 in line y5

(1)On the Graph Editor window, tap [Type] and then [y>Type] to specify an inequality expression.

(2)Tap the box to the right of line number “y5”, and then input the expression: x{2-2x-6.

(3)Press Eto store the expression.

Tip

•An error message appears if you enter an expression that does not fit the function type. Either input the new function into a different line or delete the current function and then change the type before re-inputting the function.

•You can change the equality/inequality sign of an x-type (x =, x>, x<, xt, xs) or y-type

(y =, y>, y<, yt, ys) expression after you input it. Simply tap the current equality/inequality sign.

On the Type dialog box that appears, select the sign you want and then tap [OK].

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