Casio fx-CG20 Manual De Usuario

CASIO

5-52

k Reading Coordinates on a Graph Line

  Trace lets you move a pointer along a graph and read out coordinates on the display.

  1. From the Main Menu, enter the  Graph  mode.

  2. Draw the graph.

  3. Press  

!1(TRACE), and a pointer appears in the center of the graph.* 

1 

  4. Use  

d and  e to move the pointer along the graph to 

the point at which you want to display the coordinates. 

   When there are multiple graphs on the display, press 

f and c to move between them along the 

-axis of 

the current pointer location.

• At this time, pointer coordinate values appear at the bottom of the screen and to the right 

(or left) of the pointer. Also, supplementary lines appear from the pointer to the 

-axis and 

-axis. 

• You can hide the supplementary lines by pressing 

!c. To redisplay hidden lines, 

press 

!f. 

5. You can also move the pointer by pressing 

v to display the pop-up window, and then 

inputting an 

 value. 

  The pop-up window appears even when you input an 

 value directly. 

 To exit a trace operation, press  

!1(TRACE).

  * 

1 

 The pointer is not visible on the graph when it is located at a point outside the graph display 

area or when an error of no value occurs.

  • You can turn off display of the coordinates at the pointer location by specifying “Off” for the 

“Coord” item on the Setup screen.

  • The following shows how coordinates are displayed for each function type.

  Polar Coordinate Graph 

(Y

≥≥, Y≤, X≥, X≤)

(Y

≥≥, Y≤, X≥, X≤)

(Y

>, Y<, X>, X<)

(Y

>, Y<, X>, X<)