2. what did the graphs show wh1. reflect on what the graphs are suggesting for one equation, two equations, and three equations, and describe your observations. think about the equation as a function f of x and y, for example, x+2y+1=z in the example above. geogebra automatically interprets this way, that is, like z=f(x, y)=x+2y+1 , it isolates z in the equation.

2. what did the graphs show when you entered the second equation?

3. give a simple description of the system

x=0
y=0
z=0

x = 0 can be seen as the constant function x=g(y, z)=0y+0z=0 . of course, you can use geogebra to “observe” the system.

4. give an example with 2 equations as simple as possible with 3 variables (at least 1 being non-linear; keeping z to the one power on both equations) and describe the potential of geogebra to study nonlinear systems. en you entered the second equation?