Function aplet 3-5
12.Choose the linear function whose intersection with the 
quadratic function you wish to find. 
 
The coordinates of the 
intersection point are 
displayed at the 
bottom of the screen. 
Note: If there is more 
than one intersection 
(as in our example), the coordinates of the 
intersection point closest to the current cursor position 
are displayed. 
To find the slope of 
the quadratic 
function
13.Find the slope of the quadratic function at the 
intersection point. 
 
Select Slope 
 
The slope value is 
displayed at the 
bottom of the screen.
To find the signed 
area of the two 
functions
14.To find the area between the two functions in the 
range –2 ≤ x ≤ –1, first move the cursor to 
 and select the signed area option.
 
Select Signed area
15.Move the cursor to x = –2 by pressing the   or   
key.
F1 x() 1 x–=
hp40g+.book  Page 5  Friday, December 9, 2005  12:27 AM