Question 971904: Hi,
I am trying to plot a graph of equation A(t) = 10e^-kt where k=0.03 and t is greater or equal to 0 but less than or equal to 60.
Every time I graph it on a graphics calculator, I get a linear graph but I want a graph that will show exponentially. How can I graph it to get that? What values should I set in x-axis and y-axis.
I have found a similar website to my question: http://www-rohan.sdsu.edu/~rcarrete/teaching/M-121/s07/math121/labs/lab8/q2v1.htm
So far I have done part a where I have to find value of t algebraically using natural logs
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! I used a TI-83
I used a window of x=0 to 60 and y= 0 to 10.
At first, I got a linear function, so I then plotted exp(-x) and then started making x (or t) smaller. As long as the window is taken out to 60, I did see an exponentially decreasing curve. At smaller values of the window, it can appear linear, because the changes are so slight.
I would make the y window fairly small by comparison, and I would use scales of 0.1 and see if that helps. This changes on the y-axis so slowly that if the window is too big for that, it may well look linear.
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