Graphing Calculator
"Finding Your Way Around the Graphing Calculator" (active link)
"Finding Your Way Around the Graphing Calculator" (active link)
How to Use a Graphing Calculator (below, from Kevin Beck @ Sciencing.com)
How to Use a Graphing Calculator (below, from Kevin Beck @ Sciencing.com)
Basic Graphing Functions
Basic Graphing Functions
- Press the "Y=" button to enter the function screen.
- Enter the function (e.g., Y = X2- 4) into one of the lines.
- Press "GRAPH." The calculator will draw the function for you.
To find the Y-intercept of a graph that has been drawn:
- Press "2nd," then "TRACE" to go to the "CALCULATE" window.
- Highlight "value" and press "ENTER."
- At the bottom of the screen that appears, enter "0" after "X=." The result will be the Y-intercept and associated X-coordinate.
Quadratic Equations
Quadratic Equations
- Press the "Y=" button to enter the function screen.
- Enter the function; for example, "−3x2+14x−8."
- Press "2nd," then "TRACE" to go to the "CALCULATE" window.
- Select whether the vertex is a maximum (as in this example) or a minimum.
- Using the arrows, select the LEFT BOUND and the RIGHT BOUND to get the vertex coordinates.
- Repeat the process to find the X-intercept or intercepts, if desired. It may be necessary to ZOOM out.
Non-Linear and Linear Regressions
Non-Linear and Linear Regressions
- Press "2nd," and then "STAT PLOT." Press "ENTER."
- After clearing all functions in "Y=", input data in L1 and L2.
- Graph the data points by going to "9: ZOOM STat."
- Look at "CALC" and choose a regression from the list.
- Choose "9: ZoomSTat" to view data with a regression curve.