Exponential Functions: Find the equation through the points A and B in the form y = a b x

Question 1:

A is (0,-3) and
B is (1,-6)
y = -3 × 2 x

Question 2:

A is (0,3) and
B is (1,15)
y = 3 × 5 x

Question 3:

A is (0,-3) and
B is (1,-6)
y = -3 × 2 x

Question 4:

A is (2,27) and
B is (4,243)
y = 3 × 3 x

Question 5:

A is (4,48) and
B is (5,96)
y = 3 × 2 x

Question 6:

A is (2,-18) and
B is (3,-54)
y = -2 × 3 x