You would begin by entering both functions into the grapher using the Y= key. (The triangle is the Greek letter delta, meaning “change in.” This means that the table is automatically generated by the calculator, beginning with 0 and counting by 1. Note that all secondary functions are in blue, so this one appears as TBLSET. The Table Setup is the second function of the WINDOW key, so you have to press the 2ND key first. On the Calculator section, adjusting the Table Setup will help you work backwards from the answers much more efficiently. Plugging in the Answers (PITA) is one of the most useful test-taking skills for multiple-choice questions in the SAT. Adjusting the Table Setup to assist with Plugging in the Answers
If you have zoomed in, then you can have the axes count by a decimal less than 1 if you have zoomed out, then you can set the axes to count by a value greater than 1.Īny time you need to return the graph to a standard –10-to-10 grid, just tap the ZOOM button and choose Option 6: ZStandard. The Xscl and Yscl settings allow you to adjust how the grid is scaled-that is, what each tick mark on the axes represents. If you need to zoom in and see more detail, you can set those minimum and maximum values to be narrower than the standard span if you need to zoom out to see a portion of the graph not on the standard screen, you can chose values broader than the default settings. The Xmin, Xmax, Ymin, and Ymax settings determine the extreme ends of the graphing grid that will be visible on the screen. If you hit the WINDOW button right underneath the screen, it will take you to this screen with the default settings.
Sometimes it’s necessary to change settings so that you can either zoom in on a portion of the graph or zoom out to see an area not on the standard grid. The default Window setting on the TI-84 is from –10 to 10 for both the X and Y axes.
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However, not all versions of the TI-84 Plus come equipped with that capability. If you have the TI-84 Plus, you may have access to the shortcut menus. One that may come in handy is Option 1 on the FUNC menu, which will let you work with absolute value operations and functions. For the most part, these are not menus that you will be using on the SAT. The other four menus are FUNC, MTRX, and YVAR. Option 4 changes fractions to decimals, and vice versa.Option 3 transforms improper fractions to mixed numbers.Option 1 gives you a horizontal fraction bar and enables you to type in fractions or rational expressions.The FRAC menu has four operations that can come in useful. The five buttons directly below the graphing window have function codes in green that correspond to secondary features (F1, F2, F3, F4, F5) you can access by pushing the ALPHA key before pushing the primary feature key. Using the shortcut menuīoth the TI-84 Plus CE and the TI-84 Plus C Silver Edition have shortcut menus that provide quicker access to some of the calculator’s regular functions. Or if you already have calculated a decimal, choosing the option will transform the last number on the screen into a fraction: 2. You can type in a decimal first and then choose the option: Just hit the MATH button, then choose Option 1 from the first menu that comes up: Converting fractions to decimalsĪny time you have a decimal on the Calculator section, you can change it into a fraction, provided the decimal is a rational number.
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Now it’s time to improve your SAT Calculator score by learning how to use a graphing calculator effectively. Hopefully, you have a plan in place that will unlock your potential to achieve the best possible score. In all likelihood, you have sought out an experienced SAT Prep tutor to help direct your preparation. If you have already made that commitment to preparing for the SAT, then you are surely looking for every advantage you can get.
More advanced Texas Instruments calculators (such as the TI-89 and the TI-Nspire) can do all the maneuvers listed, but the instructions given will not apply to those models. With older models such as the TI-83, TI-83 Plus, or TI-84, some of the functions described are not available. The tips given in this article are for the TI-84 Plus CE, but they will also work for the TI-84 Plus C Silver Edition and most models of the TI-84 Plus. The most popular one by far is the TI-84, although there are several versions of that model. If your school is like most high schools, your math classes favor the use of Texas Instruments calculators.
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