HP 49g Graphing Calculator - Manual (Page 107)

Finding slopes
The slope tool displays the slope of the function at the x value of the
cursor and moves the cursor to the point on tire function where the slope
was calculated. To find the slope, press
SLOPE
on the
FUNCTIONS
menu.
If the point is not within the display area, the cursor remains where it is,
the message
OFF SCREEN
is briefly displayed, and the slope of the point is
displayed near the bottom left comer of the screen.
Finding areas
The area tool displays the area between a curve and the .*■ axis between
two X values that you select.
1. Move the cursor so that it is over the graph at one end of the area that
you want to calculate.
2. Press®.
3. Move the cursor until it is over the graph at the other end of the area
that you want to calculate.
4. Press
AREA
on the
FUNCTIONS
menu.
The area is displayed near the bottom left comer of the screen.
Finding intersections
The intersection tool displays the coordinates of the intersection between
two functions, or between a function and the x axis.
The intersection tool determines the intersection of the currently selected
function and the ftmction that follows it on the Plot Functions screen. If
you have more than two fimctions plotted, you may need to select another
ftmction, or change the order of the functions listed on the Plot Fmrction
screen. (You can change the order of the functions listed by pressing
MOtTsi-
or
move
T,
on the second page of the function key menu on tire Plot
Fmrction screen.)
If two fimctions intersect at more than one point, the result is the
coordinates of the intersection closest to the cursor. If only one ftmction
is plotted, the result is the coordinates of the intersection of the ftmction
and the ,r-axis.
To find the intersection, press
INTER
from the
functions
menu.
Plotting graphs Page 4-39