Find the Equation of the Line

Question 1:

With gradient -1
through the point
(3,9)
y = x+12

Question 2:

With gradient -1
through the point
(-10,4)
y = x6

Question 3:

With gradient 1 2
through the point
(4,-5)
y = 1 2 x7

Question 4:

With gradient -5
through the point
(-10,6)
y = 5 x44

Question 5:

With gradient -3
through the point
(-3,0)
y = 3 x9

Question 6:

With gradient -2
through the point
(-1,-6)
y = 2 x8