CHAPTER Linear Equations in Two 4 Study Strategies: Taking Notes in Class 4.1 Introduction to Linear Equations in 4.2 Slope of a Line and Slope-Intercept 135 Variables and Functions OUTLINE Two Variables Form 4.3 Writing an Equation of a Line 4.4 Linear and Compound Linear Inequalities in Two Variables 4.5 Introduction to Functions Group Activity emPOWERme: Checklist for Effective Math at Work: Notes Surveyor To most people, a neighborhood is a fairly straightforward collection of houses or other sorts of buildings, each constructed on its own clearly defi ned piece of land. Luis Aguilar, who works as surveyor for his city, knows that the reality is actually far more complex. “The boundaries between properties are usually diffi cult to determine,” he explains. “Taking into account boundaries among shared spaces like roads and sidewalks only adds to the complexity.” It is the job of surveyors like Luis to make all of the borders and boundaries in an area clear. Surveyors measure distances, elevation, and other land features. These data are used to create maps, plan construction projects, and inform legal documents like deeds and leases. Usually, Luis works by fi nding a known reference point in a local area and uses this as the basis for calculations that tell him about all the land around it. “A lot of my work is done in the fi eld,” Luis describes. “I’ll visit a piece of land with a team of other surveyors, and we’ll take careful, thorough notes, and then crunch those numbers back in the offi ce.” In this chapter, we will discuss the topic of linear equations in two variables. We will also cover strategies you can use when taking notes in class.
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