Answer:
Option a. The graph of g(x) is the graph of f(x) stretched vertically.
Explanation:
If we draw a graph of f(x) = |x| and g(x) = 3|x| and we compare them
we find that g(x) is stretched vertically.
Now we will check it from both the graphs.
For graph y = |x|
for x = 4
y = 4
But for second graph which is y = 3|x|
for x value = 4
y = 12
Therefore for y values graph g(x) got stretched vertically.
Hence option a. is correct.