can sumone help me? graphing eqations..?

Question

ok so im doing linears, and like..how do u graph the equation?
i kno therez no graph here, so it would be hard to explain, but can u tell me the steps?
graphing:

y = x - 2
y = -x
y = 4x-1
y = -x+3

all of them seperately. if u want to explain one..thats fine too.
thanks

just for it to make the straight line

Answer 1

To graph a linear equation, you only need at least two points.
You just assign values to x and solve for the corresponding y.

Example: y = x - 2

When x = 0, then y = 0 - 2 = -2. This means that the point (0,-2) is a point on the line.

To get another point, substitute x by another number, preferrably near or close to your first x value, say x = 2. When x = 2, y = 2 - 2 = 0. This is the point (2, 0).

You now have two points (0, -2) and (2, 0). Plot these points on the cartesian plane (the guy above gives the directions how to plot points) and draw a straight line connecting these points. Put arrowheads at each end of the line. You now have the graph of the equation y = x - 2.

Answer 2

make a table for each of these equations, ranging from -3 to +3.

y = x - 2
x y
-3 -5 -3-2=-5
-2 -4 -2-2=-4
-1 -3 -1-2=-3
0 -2 0-2=-2
1 -1 1-2=-1
2 0 2-2=0
3 1 3-2=1

okay, so the points that you've got now are your coordinates. x and y.

x is your horizontal line. when graphing equations, you work from you x first. y is your vertical line. the point where they meet is called the origin, this is when the points are (0,0). so taking your first coordinate, (-3,-5)... you find -3 on your x axis, so that's 3 from the left of the origin, and -5 on your y axis, that's 5 down from your origin.

once you plot your points separately, you can connect them, graphing your linear equation.

this works for all of the equations you have.

good luck!

Answer 3

Just find two points on the line and then draw a line through thos two points. One way is to set y= 0 and see what x is. In your 1st problem, if y=0, x =2, so (2,0) is one point onthe line.

Now set x = 0 and see that y = -2 , so (0.-2) is your second point. Draw a line between these2 points extending it as far as you like in bothe directions. That's your graph.

In the 2nd problem, just pick a value for x such as 4. Then y=-4. so (4,-4) is one point on the line. If x =0, y=0 sso (0,0) is your 2nd point.

Do the next two problems the same way I did the 1st problem. Just remeber, you only need to points to determine a line.. There is no need to waste time plotting more than two points as some have suggested.

Answer 4

if you're looking to just graph these equations, then all you have to do is plug in a value for X and solve for Y. then plot the points.

Answer 5

can u tell me what X is? 1st: solve the equasion

Answer 6

y = x - 2
x= 1 , 2 ,3
y= -1 , 0 ,1
u can drow this
-------------------------------------------
y = -x
x=1 ,2 ,3
y=-1 ,-2 ,-3 and so on