The equations of linear system are
.
Rewrite the equation 1:
in slope - intercept form.
Subtract x from each side.
\


Divide each side by 3.
\
.
The slope of
is
and its y - intercept is
.
Rewrite the equation 2:
in slope - intercept form.
Add 2x to each side.
\


Divide each side by negative 6.
\
Cancel common terms.
\
.
The slope of
is
and its y - intercept is
.
The two line equations have same slope and the same y - intercept, so the system has infinitely many solutions.
\Observe the graph A, the two equations represent the same line, so any point on the line is a solution. So, the linear system has infinitely many solutions.
The linear system
match with graph A and it has infinitely many solutions.