Pre-Algebra Examples

Find Any Equation Perpendicular to the Line
Step 1
Choose a point that the perpendicular line will pass through.
Step 2
Solve .
Step 2.1
Rewrite the equation as .
Step 2.2
Add to both sides of the equation.
Step 2.3
Divide each term in by and simplify.
Step 2.3.1
Divide each term in by .
Step 2.3.2
Simplify the left side.
Step 2.3.2.1
Cancel the common factor of .
Step 2.3.2.1.1
Cancel the common factor.
Step 2.3.2.1.2
Divide by .
Step 3
Find the slope when .
Step 3.1
Rewrite in slope-intercept form.
Step 3.1.1
The slope-intercept form is , where is the slope and is the y-intercept.
Step 3.1.2
Reorder terms.
Step 3.2
Using the slope-intercept form, the slope is .
Step 4
The equation of a perpendicular line must have a slope that is the negative reciprocal of the original slope.
Step 5
Simplify to find the slope of the perpendicular line.
Step 5.1
Multiply the numerator by the reciprocal of the denominator.
Step 5.2
Multiply by .
Step 6
Find the equation of the perpendicular line using the point-slope formula.
Step 6.1
Use the slope and a given point to substitute for and in the point-slope form , which is derived from the slope equation .
Step 6.2
Simplify the equation and keep it in point-slope form.
Step 7
Write in form.
Step 7.1
Solve for .
Step 7.1.1
Step 7.1.2
Simplify .
Step 7.1.2.1