Graphing equations

S

SILVER

New member
Joined
Jan 27, 2011
Messages
18
I just can't uderstand how to graph algebra equations

such as: plot y=xx





I don't know where to start or how to do it please help me
 
SILVER said:
I just can't uderstand how to graph algebra equations

such as: plot y=xx

I don't know where to start or how to do it please help me
Click to expand...
Hi Yo Silver,

Plot what? Is that

\(\displaystyle y=x\)

or

\(\displaystyle y=x^2\)
 
SILVER said:
y=x squared
Click to expand...


Create a table with two columns, one for x values and one for y values.

Select some arbitrary values for x in your table and substitute them into \(\displaystyle y=x^2\) to find the y value.

For Instance:

Code: 
x   |  y=x^2
--- | -------
0   |   0
1   |   1
2   |   4
3   |   9
-1  |   1
-2  |   4
-3  |   9

Plot these coordinates on the coordinate axes and it should produce a smooth U-shaped curve.



 
masters said:
SILVER said:
y=x squared
Click to expand...


Create a table with two columns, one for x values and one for y values.

Select some arbitrary values for x in your table and substitute them into \(\displaystyle y=x^2\) to find the y value.

For Instance:

Code: 
x   |  y=x^2
--- | -------
0   |   0
1   |   1
2   |   4
3   |   9
-1  |   1
-2  |   4
-3  |   9

Plot these coordinates on the coordinate axes and it should produce a smooth U-shaped curve.
Click to expand...

YES! That is the easiest way and then just graph them. This type of equation is a parabola which curves when you graph it :)
Easy way to remember. When graphing an equation, just make a number up for "x" (like 5) and then plug it in to see what you get for y :)

FOR EXAMPLE:
Code: 
Equation: y=x^2 + 3        *****NOTE: the ^ means to the power and ^2 would mean to the second power.*****

x      |    y 
__________
0      |    3 <------------- y= 0x0 +3       y=0+3=3
1      |    4 <------------- y= 1x1 +3       y=1+3=4
2      |    7 <------------- y= 2x2 +3       y=4+3=7
3      |    12 <------------ y=3x3 +3       y=9+3=12
4      |    19 <------------ y=4x4 +3       y=16+3=19


GOOD LUCK MAN :)
 
You must log in or register to reply here.
Top