Line a passes through the points (-1, 2) and (3, 4). Line b passes through the points (-5, 0) and (3, 4). Decide whether each statement about the two lines is true or false. Explain your choice(s).
a. Lines a and b have the same y-intercept.
b. Lines a and b intersect at exactly one point.
c. Lines a and b do not intersect.
d. Lines a and b have the same slope.