Posts Tagged ‘y-intercept’

Point-Slope Formula

Friday, September 11th, 2009

How to Use the Point-Slope Formula

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Description

A detailed tutorial on the point-slope formula. Step by step tutorial including several examples of how to find the equation of a line using the point-slope formula for reference.

Overview

There are many different formulas for basic graphing, and one of these is the point-slope formula. As you may have guessed from the name, in order to use this formula you must already have the slope and a point on the line. This formula is used to find the equation of a line. This is the point-slope formula:

y - y_0 = m(x - x_0).\!

Where the variable m stands for the slope, y - y_0 stands for the y-intercept minus the y-coordinate of the point, and x - x_0 stands for the x-intercept minus the x-coordinate of the point.

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Finding Intercepts

Thursday, September 10th, 2009

How to Find X and Y Intercepts on a Graph

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Description

This video is a tutorial on how to find x and y intercepts when graphing an equation. It is shown how to continue on and graph the problem. This video provides several example problems.

Overview

Finding x and y intercepts is a simple process if the graph is in front of you, but what if you need to find the intercepts in order to graph the equation? An x-intercept is the point where the line or curve intercepts the x-axis, and is expressed as (x,0). A y-intercept is the point where the line or curve intercepts the y-axis, and is expressed as (0,y). Because you know that when you are solving for an intercept, the other variable is 0, this makes it quite easy to solve for. In a normal graphing equation, there are two variables, an x and a y. To solve for an x-intercept, set the y value equal to 0 and solve for x. To solve for a y-intercept, set the x value to 0 and solve for y. These are your intercepts.

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