In this post, I’ll demonstrate how we can use y = mx + b to find equations of lines. No need to memorize other equations of lines…it is easier to focus on the data given to us an use it to find m and b.
Category: College Algebra
How Do You Find the Mode of a Dataset?
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
How Does Elimination Compare to Matrix Elimination?
You probably noticed that the process we used to solve linear systems in Section 2.2 is almost identical to the process we used to solve linear systems in Section 2.4.
To make this concrete, let’s compare the steps for the system
How Do You Model a Stock Portfolio Containing Two Stocks?
Suppose we want to construct a stock portfolio containing two stocks. If we have $50,000 to invest and desire a total dividend return of 3%, how much must we invest in each stock?
Although this is a pretty simple portfolio, it gives us insight into how we can model the portfolio with a system of linear equations.