Describe the effect that the transformations $y = \frac{1}{3} f \left( \frac{1}{3} x \right)$ have on the graph of $y = f(x)$.

(a) The graph of $y = f(x)$ is horizontally ? stretched compressed by a factor of and vertically ? stretched compressed by a factor of . Your numerical answers should all be positive. help (numbers)

(b) If the point $(-3, 15)$ is on the graph of $y=f(x)$, what point must be on the graph of $y = \frac{1}{3} f \left( \frac{1}{3} x \right)$?
The point must be on the new graph. help (points)