UNsolve 2 variable linear equations & inequalities
The solution set of a linear equation in 2 variables, f(x,y) = 0, is a straight line in the x,y plane.
The solution set of a linear inequality is all the points in the x,y plane on one side of that line.
To UNsolve a linear equation or inequality, use the a, b and c sliders in the
rightmost panel to fix the solution set. The left panel will show the solution set. The center
panel will show you a linear equation or inequality that has that solution set.
You can use the s slider in the rightmost panel to see other linear
equations or inequalities that have the same solution set.
For a given solution set, how many equations or inequalities are there that
have that solution set? How do you know? Can you prove it?