Question 544862: How do you graph 3x + y = 9?
Found 2 solutions by saifoo.khan, rapaljer:
Answer by saifoo.khan(162)   (Show Source):
You can put this solution on YOUR website! Hello
3x + y = 9
When u have to find the x intercept, put x = 0
When u have to find the y intercept, put y = 0
x intercept:
3x + y = 9
3x +0 = 9
x = 9/3
x = 3
Ordered pair = (3,0)
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y intercept:
3x + y = 9
3(0)+ y = 9
y = 9
Ordered pair = (0,9)
Now make a point on x axis at 3 and on y axis at 9,
draw a line through them.
and u are done! =D
Answer by rapaljer(4671)  (Show Source):
You can put this solution on YOUR website! Let x=0, and find y: 3*0 + y=9, so y=9. The point is (0,9).
Let y=0, and find x: 3x+0=9, so x=3. The point is (3,0).
The graph should look like this:
For a NON-traditional explanation of Graphing, please see my own website. Click on my tutor name anywhere in algebra.com. This takes you to the homepage of my website. Near the top of my homepage, look for "Basic, Intermediate, and College Algebra: One Step at a Time." Choose Basic Algebra, and look in Chapter 4 for topics on Graphing.
I also have FREE videos of me teaching this topic. Look for the link on my homepage called "Rapalje Videos in Living Color." Look in Basic Algebra for the video "Graphing and Slope of a Line."
Since most of my career was spent teaching math IN COLOR, this became a major theme in my teaching career. In case you forget my name or can't remember how to spell it, an easy way to find my website is to go to the link www.mathinlivingcolor.com.
Dr. Robert J. Rapalje, Retired
Seminole State College of Florida
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