Finite Math Examples

,
Use to calculate the equation of the line, where represents the slope and represents the y-intercept.
To calculate the equation of the line, use the format.
Slope is equal to the change in over the change in , or rise over run.
The change in is equal to the difference in x-coordinates (also called run), and the change in is equal to the difference in y-coordinates (also called rise).
Substitute in the values of and into the equation to find the slope.
Finding the slope m.
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Simplify the numerator.
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Multiply by to get .
Subtract from to get .
Simplify the denominator.
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Remove parentheses.
Multiply by to get .
Add and to get .
Move the negative in front of the fraction.
Find the value of using the formula for the equation of a line.
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Use the formula for the equation of a line to find .
Substitute the value of into the equation.
Substitute the value of into the equation.
Substitute the value of into the equation.
Find the value of .
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Rewrite the equation as .
Simplify the left side.
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Simplify each term.
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Multiply by to get .
Simplify .
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Multiply by to get .
Multiply by to get .
Add and to get .
Now that the values of (slope) and (y-intercept) are known, substitute them into to find the equation of the line.
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