Write an equation in point-slope form, y – y1 = m(x – x1), of the line through points (1, –8) and (9, 8) use (1, –8) as the point (x1, y1).
a (y – 8) = –2(x + 1)
b (y – 8) = 2(x + 1)
c (y + 8) = –2(x – 1)
d (y + 8) = 2(x – 1)