°c Dr Oksana Shatalov, Fall 10 2 FACTS { A horizontal line has a slope of { A vertical line has slope { A line that slants upward from left to right (y "as x ") has slope{ A line that slants downward from left to right (y # as x ") has slope{ Two difierent lines are parallel if and only if their slopes are equalA line in IR3 can be described using a point on the line and a direction vector for the line Let PO (xo, yo, zo) be a specific point on the line Let P (x,y, z) be an arbitrary point on the line Using the triangle law of vector addition op = (x, y, z) = (xo, yo, zo) td orr=rotd, t e IR where d = (a, b, c) is a direction vector for the lineSatellitederived, freeair gravity map of the Kerguelen Plateau (after Sandwell and Smith, 1997) gotolink F2€ € Captions Figures Figure F2 Location of Site 1139 and sitesurvey data Navigation for Marion Dufresne survey 109, line 05 ! Abc Countdown Banner Abc Countdown Banner fBYj[ line ACR" LN^[