?
7. How do I graph y = ?
Press Y= to open the graph editor, and set Y1 equal to
. Press ZOOM , select ZSTANDARD, and press ENTER
. To further explore this graph, press TblSet , set the current value
for TBLMIN to -3, set the increment ( TBL ) to 1, and press
TABLE to generate a table of values. Notice how for x less than zero,
we have "ERROR" written in the right side of the table. This illustrates
that negative numbers are not in the domain of our function.
Return to your graph by pressing GRAPH , and now press TRACE
. A blinking cursor will appear on the screen which can be moved by pressing
the arrow keys. The coordinates of the cursor will appear at the bottom
of the screen. Hold the right arrow key down until the cursor moves
off of the screen. Notice how the graph window updates itself when this
happens. Now press ENTER . The graph will be redrawn with the current
coordinates of the cursor at the center of the screen.
8. How do I graph y = sin(x)?
Press Y= to open the graph editor, and set Y1 equal to sin(x). Press ZOOM , select ZTRIG, and press ENTER . This will create a graph window that is suitable for trigonometric functions.
9. How do I graph y = x sin(1/x)?
Press Y= to open the graph editor, and set Y1 equal to x sin(1/x). Press ZOOM , select ZTRIG, and press ENTER . To see more of the details of the graph about the origin, press ZOOM , select ZBOX, and press ENTER . Use the arrow keys to where you would like one corner of your box to be and press ENTER . Use the arrow keys again to locate a second corner at the end of a diagonal of the box and press ENTER again. Your calculator will now zoom in on the box you defined. To further explore this graph, draw more zoom boxes.
