Writing Linear Equations Given a Graph

I am in online school, and in my algebra 1 class there are several questions that have to do with writing an equation in slope intercept form from the information on a given graph.
A question might be phrased as follows:
"What is the equation of the following line written in slope-intercept form?"

They would then show a picture of the graph, but I can't get the image to work here for some reason.



I really don't understand how to do these problems and any help or sample problems would be very helpful

thanks~

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Apr 05, 2012
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by: personal loans

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Dec 18, 2010
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by: T

Thanks so much! This has really helped me, and has explained the topic in a different way to me. Thank you for responding to my question so helpfully!

~T
Dec 18, 2010
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by: Karin

When you write an equation in slope intercept form, you must be able to identify two pieces of information.

1. The slope

2. The y-intercept

So, when you look at your graph, you must be able to count the rise and run from one point to another in order to calculate the slope.

Then identify the point where the line crosses the y-axis, and this is your y-intercept.

Slope intercept form: is y = mx + b where m is the slope and b is the y-intercept.


Since you do not have a specific problem, the best lesson would be:

https://www.algebra-class.com/writing-equations.html

Follow the examples on this page and hopefully you will be able to better understand the concept.

Best of luck,
Karin

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