ok, using the Ti 89 i plot my graph and need to find a time when y=50,000 so I can say what x will be..for exp, how do I do that?
2007-08-31 18:19:31 · 2 answers · asked by m_carl 1 in Science & Mathematics ➔ Mathematics
After you've plotted the graph, you'll need to increase the window so it includes the point on the graph where y = 50,000. You can do this by zooming out or by setting the window parameters directly; I'd recommend the latter. Then use the F3 button to "Trace" the curve to where y is as close as possible to 50,000, and use the F2 button, option 2, to "Zoom In" closer to this point. Repeat until y = 50,000 to all displayed decimal places.
Incidentally, this is just how to solve for x when y = 50,000, using the plotting function in your TI-89. It's probably easier to just solve analytically. Or, you could plot the function f(x) - 50,000, where f(x) is the function you're currently plotting; then, use the F5 key, option 2, to use "Math" tools to find the "Zero" of the new function, which would be where the old function was equal to 50,000.
2007-09-04 10:55:29 · answer #1 · answered by DavidK93 7 · 0⤊ 0⤋
well you can put the equation in the homescreen, set it equal to 50,000 and make it solve for x
2007-09-01 01:24:02 · answer #2 · answered by Jeffrey R 3 · 0⤊ 0⤋