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College Algebra I

by: Jaren Mills IV

College Algebra I MATH 112

Jaren Mills IV
GPA 3.62


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Class Notes
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This 4 page Class Notes was uploaded by Jaren Mills IV on Saturday September 26, 2015. The Class Notes belongs to MATH 112 at Bowling Green State University taught by Staff in Fall. Since its upload, it has received 10 views. For similar materials see /class/214192/math-112-bowling-green-state-university in Statistics at Bowling Green State University.

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Date Created: 09/26/15
Quadratic Inequalities How to solve a quadratic inequality on your graphing calculator 1 Set the inequality equal to zero 2 Find the zeros of the function 3 Determine where the function is greater than zero above the xaxis or less than zero below the xaxis Example 1 x2 7x10 gt0 Example 2 x2 7x105 0 Example 3 3x2 4x 2 0 Example 4 3x2 4x lt 0 Creating a Scatterplot Calculator Workshop 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 JEWEEE HE 39FLig Press the button and choose 1 edit You will 5 SE LUF39Edi LCIF see the follownng screen L1 L2 L3 The values that are in these two lists might vary from g the lists on your calculator quot To clear a list use the arrow buttons to move the Lat1345 cursor on L1 or whichever list you want to clear 1 L2 L3 1 and press DO NOT press delete when Egg 3 on the name of the list This will delete the list rather Effquot that clear the column If you do accidentally delete a list hit L1139319992 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 put in the first x value 4 and hit to insert the next x value 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 in 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 set up complete hit the button and choose option 9 Zoomstat 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 Fi ding a Point of Intersection on the Calculator Examp e Sohe the toHOWhg equahon graph caHv 3X7 2 es 8 Step1 Step2 Step3 Step4 utton and enter each hght Swde ot the equahon Gtah the two equatwons bv pteeehg and the number 6 ZStandard ust vour WmeW so that the mg 0 m kmg the modw catwons and puehhg GRAD h 2 E menu choose Opho Iou Hotz Plot L iZ 52H tJ


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