Helping students gain understanding and self-confidence in algebra.
lordofthefishes wrote:"The point (1,8) is on the graph y=f(x). Find the corresponding coordinates of this point on each of the following graphs:
... c) y= -2f(-x)-7."
The textbook answer is (-1,9). I don't understand how they got this answer.
lordofthefishes wrote:Thank you, but I'm still a little confused. Why "do I have to do -1 so -x = -(-1) = +1 = 1"? Shouldn't the x correspondence of y = f(x) be (1)/-1 = -1 according to the correspondence equation?