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Let's assume that Point P lies in Quadrant 1; thus, r and s would be positive numbers, and Point Q would like in Quadrant 3. In Q3 the coordinates of any point are negative. So, the coordinates of Point Q is (–r, –s).BTGModeratorVI wrote: ↑Wed Apr 22, 2020 11:08 amIn the xy-plane, the origin O is the midpoint of line segment PQ. If the coordinates of P are (r,s), what are the coordinates of Q ?
A. (r,s)
B. (s,–r)
C. (–s,–r)
D. (–r,s)
E. (–r,–s)
Answer: E
Source: Official guide
Let's sketch a line segment with midpoint at the origin and an endpoint at (r, s)BTGModeratorVI wrote: ↑Wed Apr 22, 2020 11:08 amIn the xy-plane, the origin O is the midpoint of line segment PQ. If the coordinates of P are (r,s), what are the coordinates of Q ?
A. (r,s)
B. (s,–r)
C. (–s,–r)
D. (–r,s)
E. (–r,–s)
Answer: E
Source: Official guide
We can let the coordinates of Q be (x, y). Since the origin (0, 0) is the midpoint of PQ, we have:BTGModeratorVI wrote: ↑Wed Apr 22, 2020 11:08 amIn the xy-plane, the origin O is the midpoint of line segment PQ. If the coordinates of P are (r,s), what are the coordinates of Q ?
A. (r,s)
B. (s,–r)
C. (–s,–r)
D. (–r,s)
E. (–r,–s)
Answer: E
Source: Official guide
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