• Chapter 4

    FORMULAS 

    ARC LENGTH: s = rθ

    ANGULAR SPEED*:  W = θ/t

    LINEAR SPEED*: V = s/t = (rθ)/t = rW

    AREA OF A SECTOR: A = (½)(r²)θ

     

    VARIABLE DEFINITIONS

    s = ARC LENGTH 

    r = radius 

    θ = central angle - angle is measured in RADIANS, so may need conversion

     

    W = ANGULAR SPEED* 

    t = time 

    V = LINEAR SPEED*

    *For our purposes, "speed" and "velocity" will be the same.  (Don't tell your science teachers...) 

  • How to find a value of a function that is in Y1 given the x-value

    How to find a value of a function that is in Y1 given the x-value

    1. You could graph and use trace until you get around the x-value then look at y

    2. You could go to the table and search the x-values to find the y-value

    3. You could go to table set “TBLSET” and set the TblStart to the x-value, then look at the table

    4. OR… Go to the home screen

    5. Press “VARS”

    6. Arrow over to “Y-VARS”

    7. Select “1:Function”

    8. Select “1: Y1” or wherever your function resides

    9. Now Y1 shows up on the home screen.

    10. Type a “(“ and the x-value of choice. You could finish it with a “)”

    11. Push enter

    Example: Y1 = 8x + 3

    Y1(5) enter

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  • How to insert a regression equation into Y1

    How to insert a regression equation into Y1

    1. Enter data into list 1 and list 2 (see “how to calculate a regression equation”)

    2. Calculate a regression equation (see “how to calculate a regression equation”) Note: your Home screen will now have the regression equation

    3. Select the “Y=” button

    4. At the Y1 screen, select “VARS”

    5. Choose “5. Statistics”

    6. Arrow over to EQ

    7. Select “1: RegEQ” You should now have the regression equation you calculated in your Y1
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