Quick Problem

[troublemaker676]

Just wondering how you would graph the equation y=-2x, or how would you find the points of intersection to graph it? For my two points i get y: (0,0) and x: (0,0), but if they are both on the origin how would you graph it?

 

[Guest]

to graph y=2x use any x point.

ie x= 3

y= 2 (3)
y= 6

point is (3,6)

pick another and find a point.
plot these points and you have the line.

(0,0) is a valid point to also use and it is the intersection point.

 

[troublemaker676]

What would the x and y intercepts be?

 

[Guest]

x and y intercepts are 0

 

[dtoepel]

It appears you might not be clear that orderd pairs take on the format of
(x,y) i.e the pair (3,4) means x=3 and y=4.

In the equation y = 3x If x =2, y would be 6 (2,6)
If x=4, y would be 12 (6,12)

Dave