1950 AMC 12 Problem 44

Attempt Problem 44 of the 1950 AMC 12 below, then check your answer against the professionally curated solution from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 1950 AMC 12 solutions, or check the answer key.

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44.

The graph of y=logxy=\log x

Cuts the yy-axis

Cuts all lines perpendicular to the xx-axis

Cuts the xx-axis

Cuts neither axis

Cuts all circles whose center is at the origin

Answer: C
Concepts:logarithmfunctioncoordinate geometry
Difficulty rating: 1340
Small Hint:

Find where logx=0\log x=0

Big Hint:

The logarithm is defined only for x>0x>0

Solution:

Since log1=0,\log1=0, the graph passes through (1,0)(1,0) and therefore cuts the xx-axis. It cannot cut the yy-axis because x=0x=0 is outside its domain.

Thus, the correct answer is C.

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Problem 44 in Other Years

1951 AMC 12 · 1952 AMC 12 · 1953 AMC 12 · 1954 AMC 12 · 1955 AMC 12 · 1956 AMC 12 · 1957 AMC 12 · 1958 AMC 12 · 1959 AMC 12