Precalculus Examples

Rewrite the function as an equation.
Use the slope-intercept form to find the slope and y-intercept.
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The slope-intercept form is , where is the slope and is the y-intercept.
Find the values of and using the form .
The slope of the line is the value of , and the y-intercept is the value of .
Slope:
Y-Intercept:
Slope:
Y-Intercept:
Any line can be graphed using two points. Select two values, and plug them into the equation to find the corresponding values.
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Choose to substitute in for to find the ordered pair.
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Replace the variable with in the expression.
Simplify the result.
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Multiply by .
Subtract from .
The final answer is .
The first point is .
Choose to substitute in for to find the ordered pair.
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Replace the variable with in the expression.
Simplify the result.
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Multiply by .
Subtract from .
The final answer is .
The second point is .
Create a table of the and values.
Graph the line using the slope and the y-intercept, or the points.
Slope:
Y-Intercept:
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