TAILIEUCHUNG - Wiley publishing inc GMT for dummies Episode 2 Part 1

Tham khảo tài liệu 'wiley publishing inc gmt for dummies episode 2 part 1', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Chapter 13 Keeping in Step Coordinate Geometry Jn This Chapter Taking off on the coordinate plane Using formulas to find slope graph lines midpoints and distances Getting familiar with the graphs of functions oordinate geometry combines the study of algebra and planes with three-dimensional geometry. You can review geometry and algebra in Chapters 11 and 12 this chapter shows you how the concepts tie together. In this chapter you figure out how equations and numbers relate to geometric forms and shapes such as a straight line or a parabola. You can expect to encounter coordinate geometry questions on roughly ten percent of the problems on the GMAT. If you re not particularly savvy about coordinate geometry it won t significantly affect your GMAT math score. Taking Flight The Coordinate Plane The coordinate plane doesn t have wings but it does have points that spread out infinitely. You may not have encountered the coordinate plane in a while it isn t something most people choose to deal with in everyday life so take just a minute to refresh your memory about a few relevant terms that may pop up on the GMAT. Although you won t be asked to define these terms knowing what they mean is absolutely essential. Getting the line on some basic definitions Here are some coordinate geometry terms that show up from time to time on the GMAT 1 Coordinate plane The coordinate or Cartesian plane is a perfectly flat surface that contains a system in which points can be identified by their position using an ordered pair of numbers. This pair of numbers represents the points distance from an origin on perpendicular axes. The coordinate of any particular point is the set of numbers that identifies the location of the point such as 3 4 or x y . x-axis The x-axis is the horizontal axis number line on a coordinate plane in which values or numbers start at the origin which has a value of 0. Numbers increase in value to the right of the origin and decrease in value to the left. The x value

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