Hi can you please help

(8 points) 8. Find the equation of the line perpendicular to y = 3x +6 that passes through the point (3, 1). Sketch the graph of both lines. (8 points) 10. A tank full with 300 gallons of water starts leaking at a constant rate. After 3 minutes, the amount of water left in the tank is 288 gallons. (a) Determine an equation that relates the amount of water left in the tank ? minutes after it started leaking. (b) What is the amount of water left in the tank after 20 minutes from the time that it started leaking c) How long does it take for the amount of water left in the tank to be 120 gallons? (8 points) 11. (a) Sketch a scatterplot of the following data points. x+4 if -45x