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I can find equations of lines.

Play these games on Slope-Intercept Form

http://www.math-play.com/slope-intercept-game.html

http://hotmath.com/hotmath_help/games/kp/kp_hotmath_sound.swf

http://www.ixl.com/math/algebra-1/write-an-equation-for-a-parallel-or-perpendicular-line

http://www.ixl.com/math/algebra-1/standard-form-graph-an-equation