The point (5,7) lies on the graph g(x). What point must lie on the graph of g(5x)?

Answer 1

g(5x) is a horizontally compressed (by a factor of 5) version of g(x) so if (5, 7) is a point on g(x), then (5/5, 7) is a point on g(5x). In other words (1, 7) is a point on g(5x)