The tables show some input and output values:

table a
input output
1 7
2 9
3 9
4 5
table b
input output
6 1
7 3
7 2
8 5

which tables represent functions?
only a
only b
both a and b
neither a nor b

Look at the hyperbola graphed below. the hyperbola gets very close to the red lines on the graph, but it never touches them. which term describes each of the red lines? o o o o a. asymptote b. directrix c. focus d. axis