Entering Guesses
Entering your own guesses serves two purposes. First, it can save time by telling the Solver where to start searching. Second, if more than one solution exists, entering guesses may lead the Solver to a solution in a specified range. The closer your guesses are to the desired solution, the better chance the Solver has of finding it.
You can enter guesses at these times:
Before beginning the calculation, after you’ve stored a value for every variable except the unknown variable. If you enter one guess, the Solver generates a second guess.
After you’ve halted the iterative search.
After the Solver has returned an answer, and you wish to begin searching for another answer.
You can enter one or two guesses. If you enter one guess, the Solver makes a second guess. If you enter two guesses, the Solver uses those two guesses to start searching for a solution. The Solver works most efficiently when the answer is between your two guesses. For example, if you know the answer is between 5 and 12, you should enter 5 and 12 as the starting guesses.
To enter one guess, key in the value and press the menu key twice. For example, 4.5 enters 4.5 as a guess for a Solver variable named A and starts the calculation.
To enter two guesses, key in the first guess and press the menu key. Then key in the second guess and press the menu key twice. For example, 0 100 causes the Solver to search for A using 0 and 100.
Example: Using Guesses to Find a Solution Iteratively. One equation for calculating the profit from a manufacturing operation is:
12: The Equation Solver 181
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