a.

there is only a solution if the lines are identical

c.

the y–coordinate of the intersection point

b.

both the x–coordinate and the y–coordinate of the intersection point

d.

the x–coordinate of the intersection point

there is only a solution if the lines are identical

c.

the y–coordinate of the intersection point

b.

both the x–coordinate and the y–coordinate of the intersection point

d.

the x–coordinate of the intersection point