9514 1404 393
Answer:
M = 16
Step-by-step explanation:
M is the average of the end point values:
M = (P +Q)/2
M = (11 +21)/2 = 32/2
M = 16
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If you find half the difference, and add it to the lower value, you find it is the same:
M = P + 1/2(Q -P)
M = 11 + 1/2(21 -11) = 11 + 1/2(10) = 11 +5
M = 16
You can see this is the same if you simplify the literal equation.
M = P +1/2Q - 1/2P = P(1 -1/2) +1/2Q
M = 1/2P +1/2Q
M = (P +Q)/2
