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14 Introduction to Graphs

Learning Objectives

After studying this chapter, students will be able to... Scan to learn
 locate a point on the number line
 define coordinate axes and Cartesian plane
 locate and plot coordinates of a point in a Cartesian plane
 draw the linear graph
 draw and interpret the line graph

get ready!

Sushmita, Rohit, and their parents are watching ‘The Flypast of the year’ by 54 aircrafts and helicopters.
These included three aircraft from the French Air and Space Force, 46 from the Indian Air Force, one
from the Indian Navy, and four helicopters from the Indian Army.

Yes, they instruct the pilots
by using graphs. A controller
These aircraft are controlled by knows the location of every
air traffic controllers; they make aircraft at any particular instant
sure that aircraft can fly safely of time by using coordinates.
Wow, the great air show! without hitting each other. A small displacement of
But how do so many aircraft (up, down, forward, or
aircrafts and helicopters fly backward) is updated in ATS
at the same time without system by its coordinates.
any collision?

What are graphs
and coordinates?

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