Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I dont know the answer to the above question. I think it is the slope of a secant line but I'm not sure

a. slope of a secant line
b. graphing calculator
c. difference quotient
d. rationalizing numerator
share|cite|improve this question
@AndreasCaranti, possibly the "rationalizing" of the numerator is in the context of finding the derivative of $\sqrt x$, for example. See – The Chaz 2.0 Jul 7 '13 at 15:52
@TheChaz2.0 Hadn't thought of that, thanks, you're quite right. Deleting comment. So it's the graphing calculator? – Andreas Caranti Jul 7 '13 at 15:53
That's my best guess. I'm not overly impressed with this question, to say the least... – The Chaz 2.0 Jul 7 '13 at 15:56
@TheChaz2.0, I agree. – Andreas Caranti Jul 7 '13 at 16:01

All of the given options can actually be used to find the slope of a function:

  1. The slope of the secant line is the difference quotient.
  2. A good graphing calculator (e.g. TI-89 or HP-50G) can find it algebraically.
  3. Taking the limit of the difference quotient gives the slope of the function.
  4. Rationalizing the numerator could be done as part of taking a limit (e.g. this example from the comments.)
share|cite|improve this answer

Your guess is true!
a. slope of a secant line
actually slope of tangent line determines slope of a function

share|cite|improve this answer
How do you find the slope of the tangent line? – The Chaz 2.0 Jul 7 '13 at 15:57

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.