Casio ED-WKBK-PRECALC Datasheet download pdf (Page 19)

Quite the Quadrilateral “How-To”

The following will demonstrate how to enter a set of coordinates into two lists using

the Statistics mode of the Casio fx-9750GII. After the list is set up, you will find the

slope of a line containing the points, save the equation in the Graph mode, and find

the intersection of two lines. You will then find the length of a segment.

Line segment AB has endpoints at (−5, -2) and (3, 6) and segment CD has endpoints

at (−6, 4) and (3, −7). Find the slope for each line segment, the coordinates of their

intersection, and the length of

B .

To enter values into a list and find the line of best fit:

Activity 7 • Geometry with the Casio fx-9750GII

1. From the Main Menu, highlight the Statistics icon

and press l or press 2.

2. To label the first column, highlight the space below

List 1 and press a+(X)l.

3. To label the second column, highlight the space

below List 2 and press a-(Y)l.

4. Enter the x-values into List 1 and the y-values into

List 2. Be sure to press l after each value.

5. To view the points, press q(GRPH)u(Set)

Nq(GPH1)Nw(XY)Nq(List)1N

q(List)2lq(GPH1).

6. Press

d and q(GPH1) to view the graph.

7. Press q(Calc)w(X)q(ax+b) to find the line

of best fit.

8. Press

y(Copy)l to copy the equation into

the graph function.

9. Repeat the same steps to find the equation for the second segment.

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Casio ED-WKBK-PRECALC Datasheet Page 19