Help, My TI-83 / Ti-84 Will not Graph

It's 8 oclock at night. Dinner is over. You're sitting down to watch a movie or Monday Night Football – and then it happens. . . "Mommmmmmmmmm (or Daddddddddddd), my calculator is not working." I have to turn in my math homework tomorrow, and my graph is not showing up. "

"This can not be so bad", you think. "I passed high school math. Heck, I even installed the Quicken Accounting System at work.

The last time you looked at your child's TI-83 or TI-84 was in August at the office superstore; it was in the front of a shopping cart with on top of a pile three ring binders and notebook paper. It did not look so bad then but now you take a closer look and there are all kinds of keys you never saw before on a calculator. At the bottom is something familiar – a normal looking array of number keys, and at the right are the usual add, subtract, multiply, and divide keys. But what the heck are "MODE", "DEL", "STAT", "ZOOM", "TRACE", etc. ? What are you going to do? Who ya gonna call?

Relax.

Here are a couple of really simple things to do; but remember, the title of this article is "Help, My TI-83 / Ti-84 Will not Graph", and that is really all that is addressed in this article.

The Graphing Buttons

Look at the top row of buttons on the TI-83 / TI-84 calculator. There should be five of them, set apart from the other buttons; and they should have the following labels:

  [Y =] [WINDOW] [ZOOM] [TRACE] [GRAPH] 

This is where all of your activity is going to take place.

The Three Major Problems

Most of the time when a graph is not displaying, there are three reasons:

  1. Graph Function. The graph function is not entered properly, or not entered at all.
  2. Graph Not Turned On. The graph function is entered properly, but graphing is not turned on.
  3. Viewing Window. The viewing window for the function is set to the wrong size or location.

We will deal with these one at a time.

Check that the Graph Function is Entered Properly

Push the [Y =] key at the top of the calculator. This puts you into the Y = editor screen. You should see a screen that looks something like this:

Plot1 Plot2 Plot3

Y1 = 2X + 1

Y2 =

Y3 =

Y4 =

Y5 =

Y6 =

The expression "2X + 1" is just an example, but you need to see some kind of expression in the Y = editor screen, not just a bunch of blank "Y =" lines. If all you see is the following, then you need to add an expression:

Plot1 Plot2 Plot3

Y1 =

Y2 =

Y3 =

Y4 =

Y5 =

Y6 =

If you want to try a really simple expression to make sure that the calculator can plot, use "Y1 = X". This should plot a nice 45 degree line directly through the origin of the graph screen.

Check that the Graph Function is Turned On

It is possible that graphing of the function is not turned on in the Y = editor screen. This error is a little bit subtle. Look at the "=" sign in the equation you are trying to plot The "=" sign, must be highlighted.
If it is not, you must cursor to the "=" sign and press the [ENTER] key, to highlight it.

Viewing Window must be Set to Correct Size and Location

If the viewing window is set to the wrong size or location, the calculator may plot but you will not see it on the screen.

There are many ways to set the viewing window, but an easy reliable method is to simply "Zoom Out", until you see the function you are trying to graph. Push the [ZOOM] key at the top of the calculator. Then push "3" to zoom out. Repeat until you see the function you are trying to graph. Now you should have some idea what window you need to use to see the function plotted. Push the [WINDOW] key at the top of the calculator and adjust the display characteristics as necessary.



Source by Samuel Mela

Stock Market Timing Advice and Strategy

In the case of stock market investment, timing is critical. The only real decision that exists for any profitable stock market investor is always to target for the perfect timing for most gains and less losses.

Firms issue their stocks to get funds and make investment the business. Stocks are offered to people in order that they can purchase as well as sell them. The value of stock rests on the availability and demand involved, very similar to the cost of another item.

Engaging in the business of stock market buying and selling regularly yields more big gains to traders versus getting into regular stock enterprise. You will discover an amazing array of stocks to select from when any trader embarks upon trading the stocks. Amongst lots of registered stocks, you can find a moving stock out there.

People who unwisely continuing into the market are sure to come up with undesirable performance. Huge losses could possibly be incurred in case the stock market trend is not correctly predicted. However, little profits are irritating to the reason of trading in the market and getting more money. Inexperienced stock traders could finish up waiting around for any significant instant which may not ever come.

The following are few stock market timing advice as well as strategy …

Timing The Market

Traders make use of market timing to predict at what time the markets may switch its path. Through the use of market timing, traders look for to keep away from the harmful effects of bad stock trading. While by utilizing market timing, it can be automatically assumed and the critical spot is usually predicted prior time. By studying relevant financial data and the value, the trend of the stock market is predicted to give confidence for more profitable stock trading.

Getting The Perfect Timing

The goal of the people who are looking to achieve success at stock investment is to get the perfect market timing. The steadiness of these trend prediction is focus on many different aspects. As market timing looks like a specific method in making huge profits, it's not without critical effort. Honest effort is necessary relating persistence in learning different market aspects as well as pending attempt to stay educated regarding present stock market trends. Simple speculation have to be avoided. Speculating is really a dangerous move utilized whenever a market trader has not made the right research.

Sometimes traders buy stocks according to a hot a suggestion they received from somebody else. Unluckily, the majority of those hot recommendations finally end up being fake because they are likely to be offered by parties with their very own vested interests.

To get efficient market timing, traders have to obtain actively involved in studying regarding the company's history therefore they could compute the trend through charting the movement of price of a stock. The price of a stock should be analyzed to create a fairly correct prediction regarding the stock market trend. By utilizing this practice, traders build standards for at what time to buy as well as at what time to sell there before they could reasonably time their stock investments.



Source by Jason M Roberts