HP 10413 Datasheet download pdf (Page 165)

165

As can be seen in the screen shots right, the

bottom half of the screen shows the roots (if

any), the value of the discriminant and the

equation in the form y=ax

+bx+c.

The key labeled changes the ‘step size’ of the movements on the

screen. Possible values for the increment are 0.5, 1 and 2.

Pressing SYMB on the calculator, or the screen

key labeled will change the emphasis

from the graph to the equation in the right hand

half of the screen. Pressing PLOT on the

calculator, or the key labeled will

change the emphasis from the equation back

to the graph.

SYMB mode

In mode the student can change the coefficients directly and see the

changes reflected in the graph.

For example, on the screen shown below, the

‘v’ coefficient is highlighted and can be

changed using the ↑ and ↓ keys. The size of

the changes to ‘h’ and ‘v’ is controlled by the

key, and the same range of values is

available for the values of ‘a’ as in

mode. You can move from one coefficient to the next by using the

→ and ← keys.

As with the mode, the equation in

y=ax

+bx+c form, its roots and its discriminant

are shown on the right half of the screen.

The sequence of three screen shots right show

how the axes automatically re-position to allow

a larger range of values to be explored. There

is a limit to how far the graph can move.

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HP 10413 Datasheet Page 165