Graphing in 3D
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Ways to Graph in 3D
 Planes parallel to the plane xy have z = c (constant).
 Planes parallel to the plane xz have y = c (constant).
 Planes parallel to the plane yz have x = c (constant).
 Equation of plane is ax + by + cz + d = 0.
Example 1 :
 Sketch the graph of z = x2y+2 = f(x,y).
 Solution :
 Let z = 0 and you get y = x/2 + 1.


 If x = 0, then y = 0/2 + 1 = 1.
 If y = 0, then x/2 = 1 therefore x = 2.

 Let x = 0 and you get z = 2y + 2.


 If y = 0, then z = 2.

 Let y = 0 and you get z = x + 2.
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