The slope will depend upon the y values at x = e and x = 2e.
I have no idea what you mean by "the secant line on f"
You must have omitted a figure, or other parts of the question.
Find the slope of the secant line on f joining the points at x = e and x = 2e.
2 answers
A secant line of a curve is a line that (locally) intersects two points on the curve.
You must know equation of curve f(x) if you want to find secant line.
You must know equation of curve f(x) if you want to find secant line.