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Some links are repeated for use with more than one lesson.

7.1  Distance on the Coordinate Plane

http://www.purplemath.com/modules/distform.htm
This page explains the distance formula, shows explains, and discusses common mistakes students make when using it.

http://www.explorelearning.com/index.cfm?method=cResource.dspDetail&ResourceID=64
This page contains a gizmo exploring the distance formula.

7.2  Vectors on the Coordinate Plane

http://www.phy6.org/stargaze/Svector.htm
This page explains vectors and many different components of them.

http://hyperphysics.phy-astr.gsu.edu/hbase/vect.html
This page explains vectors and basic vector operations.

7.3 The Slope Formula

http://cs.selu.edu/~rbyrd/math/slope/
This page states the slope formula and contains an example problem with a solution.

http://www.learningwave.com/lwonline/algebra_section2/slope3.html
This site shows how to find the slope of a line using two points, and has practice problems for the students.

7.4  Linear Equations

http://www.algebra.com/algebra/homework/coordinate/lessons/linear/
This site defines linear equations, and shows how to write, solve and graph them.

http://edhelper.com/LinearEquations16.htm
This page is a sample worksheet of problem for writing an equation of the line.

7.5  Coordinate Proof

http://www.regentsprep.org/Regents/mathb/1D/Coordinatelesson.htm
This page discusses proofs in coordinate geometry.

7.6  Coordinates in Space

http://www.uni-duesseldorf.de/URZ/hardware/parallel/local/softimage/Soft3D_html/3d_learn/bas/b_coor.htm
This page explains the Cartesian coordinate system using X, Y, and Z and how to find points in space.