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Algebrator Manual

2.2.2.5.1.15 Evaluate a linear equation

This wizard is used whenever you need to find the unknown coordinate of one or
more points lying on a given line.

It can be accessed by clicking on Wizard Button | Line | Evaluate a linear
equation.

In order to find the unknown coordinate of one or more points lying on a given
line:
Enter one of the coordinates, x1 or y1 .
If you wish to enter another point's coordinate, click on "Add a new point"
button. You can repeat this process as many times as necessary.
Type the equation of the given line in the space provided (highlighted line)
Click on the "Solve Step" button to see the next step or "Solve all" button
to see all steps.
After finding all the unknown coordinates, you can click "Graph" or "Graph
all" buttons to see the graphical representation of the solution (i.e. the
graph of the line plus all the points lying on the line).

You can also enter both coordinates of a point. In that case, no calculation
will be shown but the point will be graphed. Note that you will be able to tell
from the graph if such point lies on the line or does not.
If you need an explanation for any particular step, click on the step and then
click on the "Explain" button.
2.2.2.5.2 Parabola w izards

Parabola wizards may be used to calculate vertices, intercepts and equations of
parabolas from different sets of input data. Here is the list of all the parabola
wizards:

Equation of parabola using vertex and focus
Equation of parabola using vertex and directrix
Equation of parabola using focus and directrix

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