8.4.12 Practice 1 Here is the graph for one equation in a system of equations
Type the answers in the boxes below.
1 Write a second equation for the system so it has infinitely many solutions,
2. Write a second equation whose graph goes through (0,1) so the system has no solutions.
3. Write a second equation whose graph goes through (0,2) so the system has one solution at (4,1).