# graph the equation

• Apr 2nd 2010, 09:00 PM
jjjjj
graph the equation
y+2x=2
• Apr 2nd 2010, 09:06 PM
doomgaze
Quote:

Originally Posted by jjjjj
y+2x=2

Try solving so you have y=
This function is a Y=mx+b where m is the slope and b is the Y intercept
• Apr 2nd 2010, 09:11 PM
jjjjj
graph the equation
doomgaze thanks, im having trouble on how the graph should look for

y+2x=2
• Apr 2nd 2010, 09:18 PM
doomgaze
Quote:

Originally Posted by jjjjj
doomgaze thanks, im having trouble on how the graph should look for

y+2x=2

Like I said, the best way to start is to make it a lot easier on yourself and solve so that your function has y by itself. y=
so y=2-2x or y=-2x+2 <-- this one is in perfect form of Y=mx+b

Since b=2 you know it's going to intersect the y-axis at the point (0,2) and then you use the slope m=-2/1 so you move 2 on the y-axis and then 1 on the x-axis

The graph looks like this:
http://img688.imageshack.us/img688/1156/graphjj.jpg

Most important, do you understand what I did?
• Apr 2nd 2010, 11:33 PM
mr fantastic
Quote:

Originally Posted by jjjjj
y+2x=2

You're meant to recognise ther equation of a line. Substitute x = 0 to get the y-intercept. Substitute y = 0 to get the x-intercept.
• Apr 3rd 2010, 02:43 AM
HallsofIvy
The point is- that is a linear function so its graph is a straight line. Choose any two points on that line- the intercepts mr. fantastic chose are particularly easy- and draw the line through them.