Determine the domain and range of the relation. State whether the relation is a function or not a function. 
A. domain: {4, 5, 6, 7}
range: {24, 30, 36, 42}
function
B. domain: {4, 5, 6, 7}
range: {24, 30, 36, 42}
not a function
C. domain:{24, 30, 36, 42}
range: {4, 5, 6, 7}
function
D. domain:{24, 30, 36, 42}
range: {4, 5, 6, 7}
not a function
Answer: A
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