Real math help.
How Do You Find the Slope of a Line If You Have a Perpendicular Line?
Note:
Perpendicular lines have slopes that are opposite reciprocals of each other. To find the slope of a line that is perpendicular to a given equation, find the opposite reciprocal of that slope. Check out this tutorial to learn how!
Background Tutorials
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Introduction to Algebraic Expressions
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What is a Variable?
You can't do algebra without working with variables, but variables can be confusing. If you've ever wondered what variables are, then this tutorial is for you!
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Dividing Real Numbers
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What's a Reciprocal?
Reciprocals are important when it comes to dividing fractions, finding perpendicular lines, dealing with inverse proportions, and so much more! In this tutorial you can review the basics about reciprocals.
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Defining Slope
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What's the Formula for Slope?
When you're dealing with linear equations, you may be asked to find the slope of a line. That's when knowing the slope formula really comes in handy! Learn the formula to find the slope of a line by watching this tutorial.
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Working with Standard Form
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How Do You Put an Equation in Standard Form Into Slope-Intercept or Point-Slope Form?
Looking for some practice converting the equation of a line into different forms? Then this tutorial was made for you! Follow along as this tutorial shows you how to take a linear equation from standard form and convert it into slope-intercept form and point-slope form.
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Perpendicular Lines
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How Do You Know if Two Lines Are Perpendicular?
Perpendicular lines intersect at right angles to one another. To figure out if two equations are perpendicular, take a look at their slopes. The slopes of perpendicular lines are opposite reciprocals of each other. Their product is -1! Watch this tutorial and see how to determine if two equations are perpendicular.
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Further Exploration
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Working with Slope-Intercept Form
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How Do You Put an Equation in Slope-Intercept Form Into Standard or Point-Slope Form?
Looking for some practice converting the equation of a line into different forms? Then this tutorial was made for you! Follow along as this tutorial shows you how to take a linear equation from slope-intercept form and convert it into standard form and point-slope form.
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Perpendicular Lines
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How Do You Write an Equation of a Line in Slope-Intercept Form If You Have One Point and a Perpendicular Line?
Want to find the slope-intercept form of a line when you're given a point on that line and another line perpendicular to that line? Remember, perpendicular lines have slopes that are opposite reciprocals of each other. In this tutorial, you'll see how to find the slope using the slope of the perpendicular line. Then, use this slope and the given point to write an equation for the line in slope-intercept form. Check it out!
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