Please Help!!
If f(x) varies directly with x and f(x) = 4 when x = 12, then what is the value of f(x) when x = 60?


20

180

5

300


What is the domain of the function: {(2, 1); (4, 2); (6, 3); (8, 4)}?


{6, 8}

{1, 2, 3, 4}

{1, 2, 3, 4, 6, 8}

{2, 4, 6, 8}

What is the turning point of the graph of f(x) = |2x| – 3 ?


(–2, –3)

(0, 0)

(0, –3)

(2, 0)