Algebra question, please answer

How would you graph these absolute value equations on paper?
y = l3 - xl
3y = 2x - 9l

Sorry I don't know how to make the bars around the problems on here. Please answer

You need to do a solutions table, or what some people call an x-y chart.
start with x = 3......y = 0
then pick numbers for x to the left, and right of 3
I'll pick zero, and six
when x = 0...y = 3
when x = 6...y = 3
when x = 3...y = 0

plot your points (0,3) (6,3) (3,0)...draw your graph
hint: absolute value graphs are "v" shaped

3y = I2x -9I
y = (1/3)I2x -9I
I'll give you the first point..
2x -9 = 0
x = 9/2
when x = 9/2....y = 0
pick numbers to the left, and right, of 9/2

Good Luck!!

If you want to see it go to www.wolframalpha.com and type abs ( ... ) around your equation.

There are a couple ways you could graph them.

1) using a table of values. This is tedious and long (in comparison to knowing general shape), and doesn't really show a full understanding.

2) Apply the absolute value bars after graphing the equation. So, just think of the first one as
y = 3 - x
That's simple, the line has a slope of -1, and crosses the y - axis at positive three. So you can draw that, and then, apply the absolute value. The absolute value makes all values positive, therefore when drawing the graph out, you can just "bend" or reflect everything below the x axis on the line, creating the triangle shape.


Those are the easiest methods for me, I hope that helps!