If two lines have the same slope and y-intercept, what is true of the lines?

A. The lines are perpendicular.
B. The lines intersect at the y-intercept.
C. The lines are parallel, and do not intersect.
D. The lines are the same.

Question

If two lines have the same slope and y-intercept, what is true of the lines?

A. The lines are perpendicular. 
B. The lines intersect at the y-intercept. 
C. The lines are parallel, and do not intersect. 
D. The lines are the same.

anonymous · Answer

D. The lines are the same.

EXAMPLE:

y=3x+2
y=3x+2

Same slopes (3), same y-intercepts (2), they are the same line, so they can't be parallel or perpendicular and they can't intersect.