If two lines are perpendicular, their slopes are negative reciprocals of each other. I substituted the value for the slope -2 for m and the value for the y-intercept 5 for b. Simply follow the reverse instructions to do this: We will maintain the labeling we used for finding slope. The m value in this example is therefore 1.

Since you are given two points, you can first use the slope formula to find the slope and then use that slope with one of the given points. Although the numbers are not as easy to work with as the last example, the process is still the same. Find the equation of a line that passes through the point 5, 5 and is parallel to What is your answer?

If you need to practice these strategies, click here. Tip The slope-intercept formula can also serve to change an equation into a graph. If you are comfortable with plugging values into the equation, you may not need to include this labeling step. Equations that are written in slope intercept form are the easiest to graph and easiest to write given the proper information.

The y-intercept is the point where the line crosses over the y-axis. What is your answer? Find the y-intercept of the line. Write an equation in slope intercept form given the slope and y-intercept. Transforming the slope-intercept form into general form gives Parallel and Perpendicular There is one other common type of problem that asks you to write the equation of a line given certain information.

How is this possible if for the point-slope form you must have a point and a slope? The slope-intercept form and the general form are how final answers are presented.

Write the equation of the line that passes through the points 7, -3 and 7, 0.

That is because the point-slope form is only used as a tool in finding an equation. Determine the slope of the given line.

In the example above, you were given the slope and y-intercept. How do you know which one is the right one? Most students, since they have already labeled a and when finding the slope, choose to keep that labeling system.

The strategy you use to solve the problem depends on the type of information you are given. When a problem asks you to write the equation of a line, you will be given certain information to help you write the equation.

Connect the two points to create the line. What will we look for in the problem? Yes, it is rising; therefore, your slope should be positive! This is the equation of the line in slope-intercept form. Real World Problems When you have a real world problem, there are two things that you want to look for!Write the equation for a linear function from the graph of a line.

Substituting the slope and y-intercept into the slope-intercept form of a line gives [latex]y=2x+4[/latex] How To: Given a graph of linear function, find the equation to describe the function.

Writing the Equation of a Vertical Line. Write the equation of the line.

Free line equation calculator - find the equation of a line given two points, a slope, or intercept step-by-step. Symbolab; Solutions Graphing Calculator Practice; Notebook Line Equations Calculator Find the equation of the line step-by-step. Line Equations. Line; Slope; Slope Intercept Form (new).

This is a special case of the equation of a line in that it's slope is undefined and it is parallel to the y-axis. The line passes through all points in the plane with the same x-coordinate and has equation. Slope-Intercept Equation of a Line Reminder: Horizontal lines are y = # Vertical lines are x = # Example 6: Write the equation of a line parallel to the x-axis through the point (5, 6).

A linear equation written in the form y = mx + b is in slope intercept form where m is the slope and b is the y intercept of the line. Example: Write the equation -3x + 4y = 8 in slope intercept form. Start studying Write equation of line in slope-intercept form.

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DownloadHow to write a slope intercept equation for a vertical line

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