Two points P(0, 3) and Q(0, 8) lie on the y-axis. A third point R is the midpoint of PQ. Since R is the midpoint of a segment lying on the y-axis, R also lies on the y-axis. What is the ordinate of R?

Question

Accepted Answer

5.5. Both P and Q are on the y-axis (x = 0), so R is too. Its ordinate is the average: 3 + 8/2 = 11/2 = 5.5.

Two points P(0, 3) and Q(0, 8) lie on the $y$ -axis. A third point R is the midpoint of PQ. Since R is the midpoint of a segment lying on the $y$ -axis, R also lies on the $y$ -axis. What is the ordinate of R?

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