Which of the formulas would indicate that the graph h(x) was stretched in the horizontal direction by a factor of 3?

2. Normally, to make the function of h(x) increment by 1, you have to increment x by 1. If the function h(x) becomes h(x/3), however, the function increments by 1 as x increments by 3. Thus, to reach the same values vertically, you need to move three times further horizontally.