uggg...........math.............

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I cant grasp what were doing in math.Maybe someone here can help. "graph the equation.Tell whether the equation is a function" y=x-3 and then it has a graph.Does anyone know how to do this?
 
so u just have to draw that on the graph? (and the graph is x and y cordinates)
If so then just draw it there. y=x and the line starts from -3y.
 
First you need to create a table, take 3 values,
-2 (-2-3)=-5
1 (1-3)=-1
3 (3-3)=0

So when x is -2 y is -5, when x is 1 y is -1 and when x is 3 y is 0

From the equation, you can tell the gradient is 1 and the line crosses the y axis at -3
 
dang guys thanks.lots of help.now to my next question how do I do it with fractions.

example= y= - 3/4x I dont know how to multiply a number by a fraction. I think you take x and put it over 1 then just cross multiply?
 
my friend, this is why man created the $80 plastic graphing calculator that can solve math problems and write funny words with letters when you turn the thing upsidedown

80085...lol
 
and 1337 dont forget 1337.calculators dont do much good for these problems

can x= anything? somethings I choose for x dont make a striaght line
 
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