alleryWhich algebraic rule sends (p, q) across the vertical line x = a?
A(p, q − 2a)
B(p − 2a, q)
C(p, 2a − q)
D(2a − p, q)
Answer & Solution
Correct answer: D. (2a − p, q)
The two abscissas have mean a, while the ordinate stays q.
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