Sullivan Algebra and Trigonometry: Section 2.1

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Sullivan Algebra and Trigonometry Section 2.1

• Objectives
• Use the Distance Formula
• Use the Midpoint Formula

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We define the rectangular or Cartesian coordinate
system as the plane formed by two number lines,
the x-axis and y-axis, intersecting at a right
angle.
Points in the xy-plane are located and labeled
using ordered pairs (x,y), called the coordinates
of a point.
(4,5)
(-2,-4)
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The four regions in the x-y plane are known as
quadrants, labeled as follows
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Theorem Distance Formula
The distance between two points
and
, denoted
by
is
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Example Find the distance between the points
(3,8) and (-1,2)
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Theorem Midpoint Formula
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