Computer Forums uggg...........math.............

 04-29-2006, 04:38 PM #1 BSOD     Join Date: Mar 2006 Posts: 1,072 uggg...........math............. 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? __________________
 04-29-2006, 05:21 PM #2 Golden Master     Join Date: Jul 2005 Posts: 7,459 Re: uggg...........math............. 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. __________________
 04-29-2006, 05:25 PM #3 Golden Master     Join Date: Oct 2005 Posts: 7,846 Re: uggg...........math............. To be honest mate, I know jack about maths, so I found this. http://www.artofproblemsolving.com/Forum/index.php
 04-29-2006, 05:25 PM #4 Site Team     Join Date: Dec 2002 Posts: 15,233 Re: uggg...........math............. 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
 04-29-2006, 05:26 PM #5 Golden Master   Join Date: Mar 2005 Posts: 13,091 Re: uggg...........math............. y=x-3 Let x=4 y=4-3 y=1 (4,1)
 04-29-2006, 05:28 PM #6 Golden Master     Join Date: Feb 2005 Posts: 7,366 Re: uggg...........math............. __________________ 'I may be drunk, Miss, but in the morning I will be sober and you will still be ugly.' Winston Churchill, 11/30/1874 - 01/24/1965
 04-29-2006, 06:46 PM #7 BSOD     Join Date: Mar 2006 Posts: 1,072 Re: uggg...........math............. 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?
 04-29-2006, 07:06 PM #8 Golden Master     Join Date: Feb 2005 Posts: 7,366 Re: uggg...........math............. changes the gradient. __________________ 'I may be drunk, Miss, but in the morning I will be sober and you will still be ugly.' Winston Churchill, 11/30/1874 - 01/24/1965
 04-29-2006, 08:07 PM #9 Fully Optimized   Join Date: Oct 2005 Location: 1 Posts: 2,525 Re: uggg...........math............. 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
 04-29-2006, 10:05 PM #10 BSOD     Join Date: Mar 2006 Posts: 1,072 Re: uggg...........math............. 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 __________________