4-12 Function Graphing
While a graph is displayed, you can move the free-moving cursor anywhere on
the graph and display the coordinates of any location on the graph.
You can press 6, 9, 7, or 8 to move the cursor around the
graph. When you first display the graph, no cursor is visible.
As soon as you press 6, 9, 7, or 8, the cursor moves from
the center of the viewing window.
As you move the cursor around the graph, the values of the
variables X and Y are updated, and the coordinate values of
the cursor location are displayed at the bottom of the screen.
Coordinate values generally appear in floating-decimal format.
The numeric display settings on the MODE screen do not
affect coordinate display.
To see the graph without the cursor or coordinate values,
press , or M. When you press 6, 9, 7, or 8, the
cursor begins to move from the same position.
The free-moving cursor moves from dot to dot on the screen.
When you move the cursor to a dot that appears to be “on” the
function, it may be near, but not on, the function; therefore,
the coordinate value displayed at the bottom of the screen is
not necessarily a point on the function. To move the cursor
along a function, use TRACE (page 4-13).
The displayed coordinate values of the free-moving cursor
approximate actual math coordinates accurate to within the
width/height of the dot. As XMIN and XMAX (and YMIN and
YMAX) get closer together (after a ZOOM IN, for example),
graphing accuracy increases, and the coordinate values more
closely represent the math coordinates.
)Free-moving cursor “on” the curve
Exploring a Graph with the Free-Moving Cursor
Free-Moving
Cursor
Graphing
Accuracy