Question

What does the transformation f(x) → f(9x) do to the graph of f(x)?

stretches it horizontally
ZEG
reflects it across the y-axis
shrinks it horizontally
reflects it across the x-axis

Answer 1

shrinks it horizontally

Explanation:

When transforming functions, remember that anything inside the parentheses affects things horizontally and will act opposite of what it looks like. So the (9x) will shrink the function horizontally (appearing to stretch it vertically).