Please find the slope of the secant line or the following curve in terms of x and h.
1. f(x) = 2x - 4
2. f(x) = x^2 - 2x
Can someone help solve these problems. What is h in these problems?
Thank you
Asked in post #3 of this thread: http://www.mathhelpforum.com/math-he...n-stretch.html
and answered in post #4:
When I said new question, new thread, I didn't mean that you double post the question by starting a new thread. It was advice to remember for next time.Originally Posted by Mr Fantastic
I was hoping somebody else would answer. What exactly do I need to do here? Do I need to find the average rate of change? I guess I need to understand what is the slope of the secant line of f(x) = 2x-4. The slope of the line is 2.
Will someone please explain how to do this kind of problems.
Thank you
For f(x) = x^2 - 2x:
You have the points A(x, x^2 - 2x) and the B(x+h, (x+h)^2 - 2(x+h)). The gradient of the secant is the gradient of the line joining those two points. That's what the question wants you to do (at least that what it looks like it wants you to do - you obviously have not included all of the question since h is not defined).
Do you know how to calculate the gradient of the line joining two points?