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Unformatted text preview: WIR Math 166copyright Joe Kahlig, 05B Page 1 Week in Review # 1 Section 1.1 and 1.2: Graphs and Lines • x and y axis, origin • ordered pair: (x,y) • distance formula d = q ( x 2 x 1 ) 2 + ( y 2 y 1 ) 2 • slope formula m = y 2 y 1 x 2 x 1 • equations of lines • slope intercept: y = mx + b • point slope: y y 1 = m ( x = x 1 ) • Horizontal line thru the point (a,b) is y = b • Vertical line thru the point (a,b) is x = a • Slopes of parallel lines are equal. • Slopes of perpendicular lines are negative reciprocals. 1. Which point, A(3,7) or B(9, 22), is closer to the point C(8,14)? 2. Find the equation of the line thru the point C(8,14) that is parallel to the line through points A(3,7) and B(9, 22). 3. Find the equation of the line thru (7,10) and perpendicular to 7 x + 4 y = 21 4. Find the equation of the line that crosses the xaxis at 7 and the yaxis at 8 WIR Math 166copyright Joe Kahlig, 05B Page 2 5. Find the value(s) of a so that the line thru the points B(a, 1) and C(2, 5) is perpen dicular to the line thru the points D(1, 2) and E(4, a+2)....
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This note was uploaded on 03/26/2008 for the course MATH 141 taught by Professor Jillzarestky during the Fall '08 term at Texas A&M.
 Fall '08
 JillZarestky
 Math, Equations, Distance Formula, Slope

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