View the graph below. Use the information to determine the distance from the point to the line. 2x-y = 3; (2,6)
im postin the picture
Please help
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
i would say √5
if need explanation tell, :)
please explain
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:\[d=\sqrt{(x _{2}-x _{1})^{2}+ (y _{2}-y _{1})^{2}}\]
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...:)
just think about dot product
oh .. thanks for the help
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