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Algebra
Chapter 14
Problem 3
Select a different problem
Example:
Definitions:
A
numerical expression is a number like:
An
algebraic expression uses letters and/or numbers like:
The letters are called
variables or unknowns. They represent unknown numbers.
For example: if the variable x = 2, substitute the value 2 for x everywhere in the expression:
Thus, the
values of the expressions with x = 2 are
To work these values using the graphing calculator below, enter 3*2/10 into the
Function f(x)=box for the first case.
Then click on the
Plot Graph button.
The answer will appear as f(x)=0.6 below the Function f(x)=box and will plot
as a horizontal red line 0.6 units above the x-axis on the graph.
Enter 2*5-6 into the
Function f(x)=box for the second case.
Then click on the
Plot Graph button.
The answer will appear as f(x)=4 below the Function f(x)=box and will plot
as a horizontal red line 4 units above the x-axis on the graph.
