Pre-Algebra Examples

Find the Equation Using Slope-Intercept Form m=7/8 , (3,-7)
,
Step 1
Find the value of using the formula for the equation of a line.
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Step 1.1
Use the formula for the equation of a line to find .
Step 1.2
Substitute the value of into the equation.
Step 1.3
Substitute the value of into the equation.
Step 1.4
Substitute the value of into the equation.
Step 1.5
Find the value of .
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Step 1.5.1
Rewrite the equation as .
Step 1.5.2
Multiply .
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Step 1.5.2.1
Combine and .
Step 1.5.2.2
Multiply by .
Step 1.5.3
Move all terms not containing to the right side of the equation.
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Step 1.5.3.1
Subtract from both sides of the equation.
Step 1.5.3.2
To write as a fraction with a common denominator, multiply by .
Step 1.5.3.3
Combine and .
Step 1.5.3.4
Combine the numerators over the common denominator.
Step 1.5.3.5
Simplify the numerator.
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Step 1.5.3.5.1
Multiply by .
Step 1.5.3.5.2
Subtract from .
Step 1.5.3.6
Move the negative in front of the fraction.
Step 2
Now that the values of (slope) and (y-intercept) are known, substitute them into to find the equation of the line.
Step 3