Question

(1,9) m=-3 in point slope form

Answer 1

Use the given slope and point and put it into the point-slope formula
y - y1 = m ( x - x1 )

1 is your x value (x1) and 9 is your y value (y1). M = -3

In point slope form, the answer is
y - 9 = -3 ( x - 1 )