Using Graphs & Geometry 75
Points and Lines Menu Tools 
3: Geometry Trace  Enables you to view the pathway of a 
geometric or analytic object (such as a function 
graph) on the work area. The pathway has a 
delayed fade. As more movement occurs on 
the work area, older portions of the pathway 
fade. If you temporarily halt movement, a 
portion of the trace path remains displayed. 
4: Erase Geometry 
Trace
Halts geometric trace and erases all persistent 
pathways on the work area.
Tool name  Tool function Press:
1: Point  Constructs a point defined in free 
space, on an object, or at the 
intersection of two objects.
b61
2: Point On  Constructs a point defined on an 
object. When the object is a function 
graph, the coordinates are displayed. 
b62
3: Intersection 
Point
Constructs a point at each 
intersection of two selected objects.
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4: Line  Constructs an infinite line defined by 
two points or by a point and a 
direction. If you press 
g while 
creating the line, you limit its 
orientation, relative to the x-axis or 
the horizontal aspect of the screen, 
by 15- increments.
b64
5: Segment  Constructs a segment, defined by 
two end points, which may be 
created or defined in free space or 
on a defined object. If you press 
g 
while creating the segment, you limit 
its orientation, relative to the x-axis 
or the horizontal aspect of the 
screen, by 15- increments.
b65
Tool name  Tool function