Calculate Rate of Growth for Tangent of a Graph

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Discussion Overview

The discussion revolves around calculating the growth rate of the tangent to a graph, specifically for the function f(x) = x² at the point x = 2. Participants explore the concepts of tangent lines, derivatives, and the process of finding slopes in the context of calculus.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Homework-related

Main Points Raised

  • One participant asks how to calculate the growth rate of the tangent line at a specific point on the graph of f(x) = x².
  • Another participant states that the slope of the tangent at a point is given by the first derivative at that point, implying a foundational calculus concept.
  • A participant mentions their limited experience with calculus, specifically knowing about average rates of change and asking for clarification on the concept of derivatives.
  • Another reply emphasizes that the derivative involves a limiting process that leads to the slope of the tangent, suggesting a deeper understanding of calculus is required.
  • One participant provides a specific calculation, stating that the slope at x = 2 is 4, derived from the derivative of f(x) = x².

Areas of Agreement / Disagreement

Participants express varying levels of understanding of calculus concepts, particularly derivatives and tangent slopes. There is no consensus on the clarity of these concepts, as some participants are still seeking foundational knowledge while others provide technical explanations.

Contextual Notes

Some participants demonstrate uncertainty about the definition and calculation of derivatives, indicating a reliance on prior knowledge that may not fully encompass the concept of limits involved in derivatives.

Who May Find This Useful

Individuals interested in introductory calculus concepts, particularly those learning about derivatives and tangent lines, may find this discussion beneficial.

disregardthat
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Is is possible to calculate the growth-rate to a tangent in a graph? (like f(x)=x^2

I only know how to draw the line on the graph, but how do you calculate it if you know the point where you must draw the tangent?

For example: find the tangent of the point x=2 on a graph f(x)=x^2

How do you find the rate of growth?
 
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This is one of the first things you learn about in elementary calculus. The tangent (slope) at a point on a curve is given by the first derivative at that point.
 
I have only had one class in calculus, and we learned the average rate of change. Then we got two points in a graph, and calculated the average slope. I know what a tangent of a graph is, and I have managed to sort out the somewhat accurate answer with only drawing the line, but I don't know how to calculate it.

And what is a derivative? Is a derivative the average slope for two points of the x-axis on a graph?
 
Your are talking about the whole limiting process that the derivative is. You will eventually learn how to calculate the slope of the tangent with analytical methods if you follow a calculus course.
 
Man!

:-p
 
The slope here for x=2 is 4.If you take the derivative of f(x)=x^2,you get dy/dx=2x

now substitute the value of x and you get the slope!
 

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