GRAPHING INEQUALITIES ON THE CALCULATOR

GRAPHING INEQUALITIES ON THE CALCULATOR

Graph:

y 3 on your calculator.

To do so use the APPS ALPHA x2 (I)

Inequalz

Press any key

Now on the Y= screen, anytime the cursor is over the =, you have the option of inserting an inequality symbol instead of =.

TO CHANGE FROM = TO an Inequality Symbol

ALPHA

=

<

Y= WINDOW ZOOM

> TRACE

GRAPH

So to graph y 3 Move cursor to = and press ALPHA GRAPH and then type in 3.

Graph in the standard viewing window

You are going to be asked questions (nothing personal) like "Name a point in the solution area and verify algebraically"

TO SHUT OFF INEQUALZ

APPS

ALPHA X2 (I)

1:Continue

2:Quit Inequal

? Select option 2

3: About

Graph:

y < 3x - 2

in the standard viewing window and name a point in the solution area and verify algebraically.

Graph:

y -2 Y > 2x + 2

Graph in the same standard viewing window, and sketch your graph name a point in the solution area Verify the point algebraically

After you graph:

Shades ALPHA Y= or WINDOW

POI-Trace ALPHA ZOOM or TRACE

? ALPHA GRAPH

Shades 1:Ineq Intersection - This feature graphs only the solution area

(where all shadings intersection)

2:Union ? This feature graphs the union of the shading, where either or both shadings meet

3:Original Shads ? If you select either 1: or 2: this feature goes back to the original shading

After you graph:

Shades ALPHA Y= or WINDOW

POI-Trace ALPHA ZOOM or TRACE

? ALPHA GRAPH

POI ? Trace ALPHA ZOOM or WINDOW

Gives you the point(s) of intersection of the inequality

Graph:

3x + 2y < 6 Y 0 X > - 4

Sketch all three inequalities in the same standard viewing window. Find the point(s) of intersection of all three inequalities. Name a point in the solution area and verify algebraically.

NOTES

1) 3x + 2y < 6 must first be converted to y = form

2) To have the calculator graph an inequality in the form x = -Press Y = -In the upper left-hand corner highlight x = -It gives you an x = template with inequality options - It does not lose the memory of the y= screen

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