Question

If T: (x, y) → (x - 3, y + 2), then T^-1: (x,y) → _____.


(x + 3, y + 2)
(x + 3, y - 2)
(x/3, -y/2)
(3x, -2y)

Answer 1

T^-1 means "undo" the T (or go backwards)
T adds -3 to x. what is the opposite of adding -3 to x ?
and it adds 2 to y. what is the opposite of adding 2 to y ?

Answer 2

+ 3 to x and - 2 from y

Answer 3

which choice shows that ?

Answer 4

B (x + 3, y - 2)

Answer 5

That was a lot easier than it looked...