I start off by giving the definition of a linear function, slope and y intercept.
At 6:15 I work through two examples of finding slope from 2 points.
At 13:05 we look at a real world setting modeled by a linear regression line and interpret the meaning of the slope and the y intercept in this real life application.
At 21:16 I graph the equation from the previous word problem using the slope and y-intercept and with the x-intercept and y-intercept. We then zoom in to the area of the graph that is appropriate to the word problem.
At 29:16 I discuss the attributes of linear graphs, like how can you identify if they will be increasing or decreasing, if there are any maximum or minimums, and horizontal and vertical lines.
Please check out my other lessons about Linear Functions:
Graphing Lines in Slope-Intercept form y=mx+b
Graphing lines using X & Y Intercepts
Standard Form of a Line
Slope and Equations of Lines
Equations of Lines and Graphing
Equations of parallel and perpendicular lines
Regression Lines and Correlation with TI-84
Check out www.ProfRobBob.com, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com
Tagged under: linear function,linear equation,line,lines,slope,-intercept, intercept,application,word problem,Algebra (Field Of Study),interpreting slopes,slope-intercept,math,tarrou,tarrou' chalk talk,profrobbob
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