Posted by **jen** on Sunday, September 30, 2007 at 7:54pm.

If a graph of a function is given and they tell you to draw the derivative, how do you find it if the function is not given.

- Calculus -
**Kristen**, Sunday, September 30, 2007 at 10:24pm
draw a tangent line and find the slope of that line, the derivative is equal to the slope of a tangent line at teh point

- Calculus -
**drwls**, Monday, October 1, 2007 at 7:04am
If they want you to PLOT the derivative (df/dx), you will have to measure the slope of the tangent line at a series of points along the f(x) curve, and then plot df/dx vs x.

- Calculus -
**Ken**, Sunday, August 24, 2014 at 10:58am
A triangular plate sits on the x−y plane, and has the following vertices:(0,0), (1,0), and (1,2). It's mass-density is given by the function f(x,y)=xy.

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