Question

The point (3,6) is on the graph of y=2 f(x+1)-4. Find the original point on the graph of y=f(x).

I'm honestly at a lost and have no idea what to do.

Answer 1

(3,6) satisfies y=2 f(x+1)-4 .So plug it in y=2 f(x+1)-4 .What do you get?

Answer 2

so [y=2(3+1)-4 ]

Answer 3

and y=2(6+1)-4?

Answer 4

Nope

Answer 5

The answer in the book is 4,5

Answer 6

Put x=3 and y=6 at the same time

Answer 7

then i get 6=4

Answer 8

y=2 f(x+1)-4
6=2(f(3+1)-4
10=2f(4)
5=f(4)

How you get 6=4?

Answer 9

Ah, i see, I forgot that the numbers in the brackets manipulated x and the numbers outside the brackets manipulated y. Thank you!

Answer 10

yw :)

Answer 11

And Welcome to Openstudy!

Answer 12

thanks