Asked by Antia
A line has Cartesian equation 3x-2y+3=0 .Determine a direction vector for a line that is parallel to this line.
Could someone explain to me why the answer is
direction vector: d=(2,3)
Could someone explain to me why the answer is
direction vector: d=(2,3)
Answers
Answered by
bobpursley
Any line in two-dimensional Euclidean space can be described as the set of solutions to an equation of the form
ax + by + c = 0
where a, b, c are real numbers. Then one direction vector of (D) is (-b,a). Any multiple of (-b,a) is also a direction vector.
For example, suppose the equation of a line is 3x + 2y + 15 = 0. Then (-2,3), (-4,6), and (2,-3) are all direction vectors for this line.
ax + by + c = 0
where a, b, c are real numbers. Then one direction vector of (D) is (-b,a). Any multiple of (-b,a) is also a direction vector.
For example, suppose the equation of a line is 3x + 2y + 15 = 0. Then (-2,3), (-4,6), and (2,-3) are all direction vectors for this line.
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