Sheets or Excel can be used to find the mode of a set of data.
How Do You Compute the Sample Mean or Variance in a Spreadsheet?
Both Excel and Sheets use the same commands to calculate a sample mean, sample variance, or sample standard deviation. This FAQ demonstrates how to use these commands.
How Do You Find The Derivative at a Point From the Definition?
The most difficult part of finding a derivative is evaluating the limit involved in the definition of the derivative at a point. Often there is some algebra and simplifying involved as the example below demonstrates.
What is the Difference Between A Secant Line and a Tangent Line?
Many students struggle with slopes of tangent lines versus slopes of secant lines. In the example below, I find these slopes and use them to compute the equation of a tangent line and the equation of a secant line.
The secant line is the red line to the right that passes through two points on the curve. The tangent line is the green line that just grazes the curve at a point.
How Do You Solve A Linear System with WolframAlpha?
Many of you may already be familiar with using a graphing calculator to put a matrix in reduced row echelon form. Did you know that you can do the same thing with WolframAlpha?
To see how this is done, let’s start from the system of linear equations
