Find Slope of Line: Find the slope of line l1 using points O(0,0) and A(1,2).\ Slope (m)=x2−x1y2−y1=1−02−0=2.\ Equation of l1 using slope-intercept form: y=mx+c. Since it passes through the origin, c=0.\ Equation of l1: y=2x.
Shift Line Downward: Derive the equation of line l2 by shifting l1 downward by 6 units.New y-intercept = original y-intercept −6=0−6=−6.Equation of l2: y=2x−6.
Find X-Intercept: Find the x-intercept of l2 where y=0.0=2x−6; 2x=6; x=3.Point C on l2 and x-axis: C(3,0).
Parallelogram Property: Since ABCO is a parallelogram, vectors OA and BC are parallel and equal, and vectors AB and OC are also.Coordinates of B can be found using vector addition: B=C−A+O.B=(3,0)−(1,2)+(0,0)=(2,−2).This is incorrect, let's correct it: B=(3,0)−(0,0)+(1,2)=(4,2).