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Mathematics 12 Online
OpenStudy (anonymous):

View the graph below. Use the information to determine the distance from the point to the line. 2x-y = 3; (2,6)

OpenStudy (anonymous):

im postin the picture

OpenStudy (anonymous):

OpenStudy (anonymous):

Please help

OpenStudy (anonymous):

hint: the point of intersection is approximately (1.46, 6) 1) 2√10 2) D = √5 = 2.2 3) D = √2 = 1.4 4) 5

OpenStudy (anonymous):

i would say √5

OpenStudy (anonymous):

if need explanation tell, :)

OpenStudy (anonymous):

please explain

OpenStudy (anonymous):

Pretend that you are trying to learn about a line segment, who's two endpoints are the coordinate of the point, and the coordinate of the intersection. The length of a line segment can be found using the distance formula:\[d=\sqrt{(x _{2}-x _{1})^{2}+ (y _{2}-y _{1})^{2}}\]

OpenStudy (anonymous):

ok. The way line equation is written is colled vector form (or cartesian). It says basicly that the projection of position vector on the vector (2,-1) which is perpendicular to the line , is equal 3 for the points on the line. For the point not on the line you can find their distance to it, finding their position vector projection on the vector (2,-1) by puging the values in the equation and resting 3, which is the distance to the origin. Hope you understand...:)

OpenStudy (anonymous):

just think about dot product

OpenStudy (anonymous):

oh .. thanks for the help

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