Help...what is graphing inequalities in 1 variable and graphing lines and 2 variable inequalities ? If you could maybe give me an example. I am really lost..
2007-11-04 07:07:16 · 2 answers · asked by Jenniefrizzzle 4 in Science & Mathematics ➔ Mathematics
Inequalities in one variable would be of the kind:
x> 10, or -3
...........o.........0................o............o.............
The 1st o is -3, the 2nd o is +7, the 3rd o is 10.
The graph of the inequality -3,x<7 would be a solid line connectin the 1st and secon o. Notice it passes through 0.
The graph of x>10 would be a straight line extenting from the 3rd o to the right forever.
If we have two variables, then we have an equation like
y=3x +5. This is the equation of a straight line. You need to graph this on a set of x-y-coordinate axes.
If you set x =0, you get y = 5, so (0,5) is one point on the line.
If you set y = 0 you get x = -5/3, so (-5/3,0) is a 2nd point on the line. Now you just draw a line between these two points extending it in either direction as far as you wish. That's the graph of the line y = 3x+5.
Note: you may have to place your mouse cursor over the number line to see it in its entirety.
2007-11-04 07:32:00 · answer #1 · answered by ironduke8159 7 · 0⤊ 0⤋
An example of an inequality in one variable: x < 5
Graphed on a number line: http://s233.photobucket.com/albums/ee195/DWRead/?action=view¤t=grace-a.jpg
2007-11-04 15:19:20 · answer #2 · answered by DWRead 7 · 0⤊ 0⤋