3y = x - 6 y = 1/3x - 2. slope her is 1/3. A perpendicular line will have anegative reciprocal slope. To find the negative reciprocal of a number, u flip the number and change the sign. So the slope we need os -3/1 or just -3.(see how I flipped the slope and changed the sign)
y = mx + b slope(m) = -3 (3,-5)...x = 3 and y = -5 now we sub and find b, the y int -5 = -3(3) + b -5 = -9 + b -5 + 9 = b 4 = b