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College Algebra I

by: Jaren Mills IV

College Algebra I MATH 1120

Jaren Mills IV
GPA 3.62


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This 5 page Class Notes was uploaded by Jaren Mills IV on Saturday September 26, 2015. The Class Notes belongs to MATH 1120 at Bowling Green State University taught by Staff in Fall. Since its upload, it has received 10 views. For similar materials see /class/214194/math-1120-bowling-green-state-university in Statistics at Bowling Green State University.

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Date Created: 09/26/15
Basic Skills Scientific Notation Example 1 Use a calculator to evaluate each expression a 65000 x 3400000000 b 000000348870 Solutions a Rewrite as 65 E 4 and 34 E 9 Push 65 E4E34 9E This implies that 65000 x 3400000000 221 E 14 221000000000000 b Rewrite as 348 E 7quot and 87 E 2 Push 348 7EI8J 2 This implies that 000000348870 4 E 10 0000000004 6 5E43 4E 221E14 Example 2 Evaluate the following expression by hand and then use scientific notation on the calculator to check your answer 24 l 0000045 39ji 0000315l3l3j By Hand oh Calculator 24E9 x 45E63E5 x 15E3 240000000000001345 5 SO W 240000 142 in g ExponentsRootsAbsolute Value Exponents A and x2 a 3quot b 4 c El Roots a 5 9El b 23921 27 El 4951 6 4 16El Absolute value a l3l 3E m 7E Fixing Syntax Errors Syntax error is when you might enter something on the calculator in the wrong order or some kind of typo Here are some examples of common errors 1 Using subtraction instead of 2 Using multiplication instead of 3 Hitting the same button twice When a syntax error occurs the best way to resolve the problem is to choose option 2 GOTO and the calculator will place the cursor where the error is occurring This will allow you to find and correct the error quickly Example 1 Graph the horizontal line y 5 Under the y editor hit the subtraction button 5 and You will find yourself looking at the screen at the right Choose option 2 and the cursor will direct you where the problem lies 39gwtz Mots Vg 333 Notice that the curser is flashing on the subtraction 29 sign Change the subtraction sign to a negative and then try to graph What happens Example 2 On your home screen type the following 3 7 and enter You will get a syntax error Choose option 2 GOTO and notice where the cursor is flashing Again the cursor shows you where the error is IF Creating a Scatter Plot A scatter plot is a graph of data points To graph the data we must first enter our data X and y values into the calculator We enter these values into lists So first we must become familiar with using lists To access the lists IPLiS t EtUPEditDP 39 Press the button and choose 1 edit You will see the following screen The values that are in these two lists might vary from the lists on your calculator To clear a list use the arrow buttons to move the cursor on L1 or whichever list you want to clear and press quotquot quot v DO NOT press delete when on the name of the list This will delete the list rather that clear the column If you do accidentally delete a list hit 399 2 Entering data in a list Typically but not always L1 is used for X values and L2 is used for y values Ix l4 l3 2 1 0 1 2 l3 l4 y 1 5 3 7 5 I8 2 0 45 Once you clear L1 and L2 place the cursor in the L1 column and type in the first X value 4 and hit Continue this procedure until all X values are entered Then move the cursor to the L2 column and do the same to enter the y values When you are done entering the data you wish to plot you should be able to see all the values in the list Before we try to plot the data we need to make sure the scatterplot is set up properly To get to the setup screen press Notice that there are three possible plots Since we are plotting one set of data we only need to use one plot Only one plot should be turned on Let s use plot 1 Press on plot 1 Be sure to turn the plot on by pressing while the cursor is blinking on ON You can choose the type of graph to plot under type The first choice represents a scatterplot Make sure that L1 represents the X values and L2 represents the y values Lastly you can customize your graph by choosing what symbol you prefer to represent the points Once you have the setup complete hit the Elm51 button and choose option This Will automatically set your window and graph If you want to set the window manually hit the button instead of choose the min and max values and hit In Summary it is a 3 step process to create a scatterplot on your graphing calculator 1 l 1 Tell the calculator which points to plot a 2 Tell the calculator to draw the points El 3 Look at the points 9ZoomSTA


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