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Algebra Examples
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Step 1
Step 1.1
Slope is equal to the change in over the change in , or rise over run.
Step 1.2
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).
Step 1.3
Substitute in the values of and into the equation to find the slope.
Step 1.4
Simplify.
Step 1.4.1
Multiply the numerator and denominator of the fraction by .
Step 1.4.1.1
Multiply by .
Step 1.4.1.2
Combine.
Step 1.4.2
Apply the distributive property.
Step 1.4.3
Simplify by cancelling.
Step 1.4.3.1
Cancel the common factor of .
Step 1.4.3.1.1
Cancel the common factor.
Step 1.4.3.1.2
Rewrite the expression.
Step 1.4.3.2
Cancel the common factor of .
Step 1.4.3.2.1
Move the leading negative in into the numerator.
Step 1.4.3.2.2
Factor out of .
Step 1.4.3.2.3
Cancel the common factor.
Step 1.4.3.2.4
Rewrite the expression.
Step 1.4.3.3
Multiply by .
Step 1.4.3.4
Cancel the common factor of .
Step 1.4.3.4.1
Cancel the common factor.
Step 1.4.3.4.2
Rewrite the expression.
Step 1.4.4
Subtract from .
Step 1.4.5
Simplify the denominator.
Step 1.4.5.1
Multiply .
Step 1.4.5.1.1
Multiply by .
Step 1.4.5.1.2
Multiply by .
Step 1.4.5.2
Cancel the common factor of .
Step 1.4.5.2.1
Factor out of .
Step 1.4.5.2.2
Cancel the common factor.
Step 1.4.5.2.3
Rewrite the expression.
Step 1.4.5.3
Add and .
Step 2
Use the slope and a given point to substitute for and in the point-slope form , which is derived from the slope equation .
Step 3
Simplify the equation and keep it in point-slope form.
Step 4
Step 4.1
Simplify .
Step 4.1.1
Rewrite.
Step 4.1.2
Simplify by adding zeros.
Step 4.1.3
Apply the distributive property.
Step 4.1.4
Combine and .
Step 4.1.5
Multiply .
Step 4.1.5.1
Multiply by .
Step 4.1.5.2
Multiply by .
Step 4.2
Move all terms not containing to the right side of the equation.
Step 4.2.1
Add to both sides of the equation.
Step 4.2.2
To write as a fraction with a common denominator, multiply by .
Step 4.2.3
Write each expression with a common denominator of , by multiplying each by an appropriate factor of .
Step 4.2.3.1
Multiply by .
Step 4.2.3.2
Multiply by .
Step 4.2.4
Combine the numerators over the common denominator.
Step 4.2.5
Add and .
Step 4.2.6
Cancel the common factor of and .
Step 4.2.6.1
Factor out of .
Step 4.2.6.2
Cancel the common factors.
Step 4.2.6.2.1
Factor out of .
Step 4.2.6.2.2
Cancel the common factor.
Step 4.2.6.2.3
Rewrite the expression.
Step 5
Reorder terms.
Step 6
List the equation in different forms.
Slope-intercept form:
Point-slope form:
Step 7