Calculator Procedures
To Enter Data into Lists
STAT
select EDIT at the top of the screen
select 1: Edit
enter the numbers
To create a Scatter Plot
enter the data in 2 lists (enter the values for the independent variable in the 1st list used and the dependent variable values in the 2nd perhaps)
2nd STAT PLOT
select the plot to use (either 1:, 2:, or 3:)
select ON
select the Scatterplot as the Type of plot (it is the 1st type listed)
indicate which lists are to be used as the x coordinates and y coordinates (2nd L1 or L2, L3 etc.)
(x list is the independent variable and y list is the dependent)
Graph
adjust window to see the scatterplot using Zoom 9 or Window if you want to define the window
To determine (and Graph) the Equation for the Line of Best Fit - Regression
enter the data in 2 lists (enter the values for the independent variable in the 1st list used and the dependent variable values in the 2nd perhaps)
To determine the equation of the line of best fit (i.e. regression)
STAT
select CALC at the top of the screen
select 4:LinReg(ax+b)
indicate which lists to use – Note: how to do that depends on your calculator
Either…… LinReg(ax+b) L1 , L2 (note the comma between the list names) then Enter
Or………. enter the list names where indicated then select Calculate
the calc. will give the slope value as a and the y intercept value as b
To graph the line of best fit the equation must entered in the calculator at Y =
enter the equation by using the slope and y intercept values determined using the procedure above
To determine the Correlation Coefficient
To determine the correlation coefficiententer the data and determine the equation for the line of best fit as described above. The correlation coefficient will be provided as “ r ” with theequation as long as the “Diagnostics On” feature is enabled. To do that
2ndCATALOG
scroll toDiagnostics On
ENTER
ENTER
To determine they Coordinate on a Graph for a given x Coordinate
graph the equation
The x coordinate you want to determine the y partner for must be within your graphing window. For example if you are trying to determine the y coordinate with an x coordinate of 5, then your window must be such that the x axis reaches to 5
2ndCalc
select 1: value
enter the x coordinate you are using
Enter
To find where two lines intersect /an Intersection Point
enter the equations at y =
Graph (The intersection point must be visible on the screen. You may need to adjust your window. Try Zoom then Zoom Out or Zoom Fit)
2nd calc.
select 5: intersect
The calc. will ask First curve? Be sure one of your equations is showing in the corner.
Enter
The calc. will ask Second curve? Be sure your other equation is showing.
Enter
The calc. will ask Guess?
Enter
To determine an X -Intercept
Enter the equation at y =
Graph
2nd calc
Select option 2 – Zero
Left bound – Move your cursor to the left of the intercept - Enter
Right bound – Move your cursor to the right of the intercept - Enter
Guess – Enter
To Check Polynomial Multiplication
Enter the polynomials to be multiplied
2nd Test
Select option 1 (=)
Enter your suggested answer/product
Enter
1 indicates it is correct, 0 indicates it is incorrect
To Check Factors
Enter the polynomial to be factored
2nd Test
Select option1 (=)
Enter the suggested factors
Enter
1 indicates it is correct, 0 indicates incorrect