WIR Math 166-copyright Joe Kahlig, 05BPage 1Week in Review # 1Section 1.1 and 1.2: Graphs and Lines•x and y axis, origin•ordered pair: (x,y)•distance formulad=q(x2-x1)2+ (y2-y1)2•slope formulam=y2-y1x2-x1•equations of lines•slope intercept:y=mx+b•point slope:y-y1=m(x=x1)•Horizontal line thru the point (a,b) isy=b•Vertical line thru the point (a,b) isx=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 throughpoints A(3,7) and B(9, 22).3. Find the equation of the line thru (7,10) and perpendicular to 7x+ 4y= 214. Find the equation of the line that crosses the x-axis at 7 and the y-axis at-8
WIR Math 166-copyright Joe Kahlig, 05BPage 25. Find the value(s) ofaso 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).