SOLUTION: hello i would please like to learn how to graph these equations y= -1/3x + 4 9x-4y=36 y=4

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Question 478081: hello i would please like to learn how to graph these equations
y= -1/3x + 4

9x-4y=36

y=4

Found 2 solutions by Theo, lwsshak3:
Answer by Theo(13342) About Me  (Show Source):
You can put this solution on YOUR website!
in order to graph the equation, you need to solve for y.
x is the independent variable and y is the dependent variable.
the value of y depends on the value of x.
for every value of x, you use the equation to find the corresponding value of y.
here's the graph of y = (-1/3)x + 4
graph%28300%2C300%2C-10%2C10%2C-10%2C10%2C%28-1%2F3%29x+%2B+4%29
to graph 9x - 4y = 36, you need to solve for y
subtract 9x from both sides of the equation to get:
-4y = -9x + 36
divide both sides of the equation by -4 to get:
y = (9/4)x - 9
here's the graph of y = (9/4)x - 9
graph%28300%2C300%2C-10%2C10%2C-10%2C10%2C%289%2F4%29x+-+9%29
here's the graph of y = 4
graph%28300%2C300%2C-10%2C10%2C-10%2C10%2C4%29
here's a reference on how to create a graph manually.
http://www.purplemath.com/modules/graphing2.htm
here's a link to an online graphing software that allows you to create your own graphs from the equation.
http://www.e-tutor.com/et2/graphing
to use this, you solve the equation for y and enter the right side of the equation in the space provided and click on graph.
for example:
your equation of y = (9/4)x - 9 would be entered in the box as (9/4)x - 9
there are some instructions on how to use it.
read them.
they might help.

Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
hello i would please like to learn how to graph these equations
y= -1/3x + 4
9x-4y=36
y=4
**
y= -1/3x + 4
This is an equation of a straight line with a slope =-1/3, and y-intercept=4
To graph: find the y-intercept at 4 on the y-axis. From this point, move one unit to the left and 3 units up to establish a second point. These two points are on the graph of the line. You could check if these points are correct by plugging in an x-value which should give a y-value right on the line.
..
9x-4y=36
change to standard form
4y=9x-36
divide by 4
y=9x/4-9
To graph, use the same procedure as above except you now have a slope=9/4 and a y-intercept of -9.
Remember, slope=∆y/∆x=rise/run=change in y/change in x
..
y=4
This is merely a horizontal line 4 units above the x-axis