Answer:
1) Infinitely many solutions.
2) No real solutions.
3) (-1, 2)
Explanation:
The solutions of a system of linear equations is whenever the two lines intersect.
However, if the two lines never intersect (they are parallel), then there are no solutions.
And if the two lines are the same line, then there are infinitely many solutions.
First Graph:
The two lines are exactly the same.
Hence, there are infinitely many solutions.
Second Graph:
The two lines are parallel. They will never intersect each other.
Therefore, there are no real solutions.
Third Graph:
The two lines intersect at the point (-1, 2).
Hence, there is only one solution and it is (-1, 2).